diff --git a/data/scenarios/Challenges/2048.yaml b/data/scenarios/Challenges/2048.yaml
index e4ea5b982..78b140b1f 100644
--- a/data/scenarios/Challenges/2048.yaml
+++ b/data/scenarios/Challenges/2048.yaml
@@ -5,10 +5,10 @@ description: Make 2048!
 objectives:
   - goal:
     - OK, OK, it's not really the same as the classic "2048" game.
-      However, your goal is still to make 2048!  You start with a `1`
+      However, your goal is still to make 2048!  You start with a `1`{=entity}
       which regrows immediately when
-      it is harvested, so if you plant it, you can get as many as you want.  Your
-      job is to combine `1`s in order to make a `2048`
+      it is `harvest`ed, so if you plant it, you can get as many as you want.  Your
+      job is to combine `1`{=entity}s in order to make a `2048`{=entity}
       entity.
     - "Hint: the `format` command can turn numbers into strings!"
     condition: |
diff --git a/data/scenarios/Challenges/Mazes/easy_cave_maze.yaml b/data/scenarios/Challenges/Mazes/easy_cave_maze.yaml
index 94794a54c..42667376b 100644
--- a/data/scenarios/Challenges/Mazes/easy_cave_maze.yaml
+++ b/data/scenarios/Challenges/Mazes/easy_cave_maze.yaml
@@ -7,7 +7,7 @@ objectives:
   - You are at the top of a cave that gradually descends until reaching a dead end.
   - At its bottom is a great treasure.
   - Luckily, the cave does not branch out, so it is easy to find the path to the treasure.
-  - Send a robot to the the item marked as '!'. You win once the robot grabs it.
+  - Send a robot to the the item marked as '**!**'. You win once the robot `grab`s it.
   condition: |
     j <- robotNamed "judge";
     as j {has "goal"}
diff --git a/data/scenarios/Challenges/Ranching/capture.yaml b/data/scenarios/Challenges/Ranching/capture.yaml
index 5740be713..bc0d541f4 100644
--- a/data/scenarios/Challenges/Ranching/capture.yaml
+++ b/data/scenarios/Challenges/Ranching/capture.yaml
@@ -15,7 +15,7 @@ objectives:
     goal:
       - |
         This porcine pest has been running amok.
-        Block the pig by a "monolith" on all four sides to capture it.
+        Block the pig by a `monolith`{=entity} on all four sides to capture it.
       - Blocking on fewer than four sides will spook the pig, and he will escape!
     condition: |
       def isSurrounded = \n.
diff --git a/data/scenarios/Challenges/Ranching/gated-paddock.yaml b/data/scenarios/Challenges/Ranching/gated-paddock.yaml
index 6e375469a..78dafddbb 100644
--- a/data/scenarios/Challenges/Ranching/gated-paddock.yaml
+++ b/data/scenarios/Challenges/Ranching/gated-paddock.yaml
@@ -12,14 +12,14 @@ objectives:
         You've homesteaded on a small island in the ocean.
         It's time to gather resources to trade.
       - |
-        You encounter some feral sheep (@). They slowly wander the island and eat grass.
+        You encounter some feral sheep (**@**). They slowly wander the island and eat grass.
         Your mind wanders to textiles...
       - |
         First, paddock at least one sheep so they don't drown.
         Make sure there are no gaps in the fence!
       - |
-        Note that you can use the "drill" command (by way of the "post puller" tool)
-        to demolish a fence that has been "placed".
+        Note that you can use the `drill` command (by way of the `post puller`{=entity} tool)
+        to demolish a `fence`{=entity} that has been `place`d.
     condition: |-
       // Algorithm:
       // ----------
@@ -287,7 +287,7 @@ objectives:
         The sheep will move toward something edible on
         an adjacent tile and will eat it if they walk over it.
       - |
-        You may want to add a gate to the fence
+        You may want to add a `gate`{=entity} to the fence
         to give yourself easier access.
     condition: |-
       def getTruthForSheepIndex = \predicateCmd. \i.
@@ -317,11 +317,12 @@ objectives:
 
       anySheep (has "clover") 3;
     prerequisite: enclose_sheep
-  - goal:
+  - teaser: Knit sweater
+    goal:
       - |
-        Yum! Contented, well-fed sheep may drop wool.
+        Yum! Contented, well-fed sheep may drop `wool`{=entity}.
       - |
-        Winter is coming! Collect three wool bundles to make a sweater.
+        Winter is coming! Collect three wool bundles to make a `sweater`{=entity}.
       - |
         Each sheep drops a finite amount over
         their lifetime.
diff --git a/data/scenarios/Challenges/Ranching/powerset.yaml b/data/scenarios/Challenges/Ranching/powerset.yaml
index 538e84214..14160ca3d 100644
--- a/data/scenarios/Challenges/Ranching/powerset.yaml
+++ b/data/scenarios/Challenges/Ranching/powerset.yaml
@@ -32,7 +32,7 @@ objectives:
         However, his experiment is incomplete! He has forgotten one combination.
       - |
         Place the missing hybrid combination in the empty eastern-most column.
-        After you have done this, `place` the "bell" anywhere, and then Bill will inspect
+        After you have done this, `place` the `bell`{=entity} anywhere, and then Bill will inspect
         your work.
     prerequisite:
         not: wrong_anwser
diff --git a/data/scenarios/Challenges/Sliding Puzzles/3x3.yaml b/data/scenarios/Challenges/Sliding Puzzles/3x3.yaml
index 8758f2f9a..8261342c7 100644
--- a/data/scenarios/Challenges/Sliding Puzzles/3x3.yaml	
+++ b/data/scenarios/Challenges/Sliding Puzzles/3x3.yaml	
@@ -23,7 +23,7 @@ objectives:
       - |
         Or, if you prefer, `drill` a tile to cause it to slide
         into the adjacent empty space. However, you must not drill a tile that
-        has nowhere to slide. Also, drilling consumes "ink", which will be replenished
+        has nowhere to slide. Also, drilling consumes `ink`{=entity}, which will be replenished
         after the sliding operation is complete, so avoid drilling too fast in
         succession.
     condition: |
diff --git a/data/scenarios/Challenges/Sokoban/Gadgets/no-reverse.yaml b/data/scenarios/Challenges/Sokoban/Gadgets/no-reverse.yaml
index 101545b6f..ab98ed0a7 100644
--- a/data/scenarios/Challenges/Sokoban/Gadgets/no-reverse.yaml
+++ b/data/scenarios/Challenges/Sokoban/Gadgets/no-reverse.yaml
@@ -7,7 +7,7 @@ creative: false
 seed: 0
 objectives:
   - goal:
-      - Grab the flower.
+      - Grab the `flower`{=entity}.
     condition: |
       as base {
         has "flower";
diff --git a/data/scenarios/Challenges/Sokoban/Gadgets/one-way.yaml b/data/scenarios/Challenges/Sokoban/Gadgets/one-way.yaml
index 0ef32e6ff..712ebd54c 100644
--- a/data/scenarios/Challenges/Sokoban/Gadgets/one-way.yaml
+++ b/data/scenarios/Challenges/Sokoban/Gadgets/one-way.yaml
@@ -7,7 +7,7 @@ creative: false
 seed: 0
 objectives:
   - goal:
-      - Grab the flower.
+      - Grab the `flower`{=entity}.
     condition: |
       as base {
         has "flower";
diff --git a/data/scenarios/Challenges/Sokoban/Simple/trapdoor.yaml b/data/scenarios/Challenges/Sokoban/Simple/trapdoor.yaml
index c2ad7d1ad..999f09e01 100644
--- a/data/scenarios/Challenges/Sokoban/Simple/trapdoor.yaml
+++ b/data/scenarios/Challenges/Sokoban/Simple/trapdoor.yaml
@@ -12,7 +12,7 @@ creative: false
 seed: 0
 objectives:
   - goal:
-      - Place the flower on the target.
+      - Place the `flower`{=entity} on the target.
       - You may have to start over if you get stuck.
     condition: |
       as base {
diff --git a/data/scenarios/Challenges/Sokoban/foresight.yaml b/data/scenarios/Challenges/Sokoban/foresight.yaml
index dc54b682e..88095d9d8 100644
--- a/data/scenarios/Challenges/Sokoban/foresight.yaml
+++ b/data/scenarios/Challenges/Sokoban/foresight.yaml
@@ -13,7 +13,7 @@ attrs:
     fg: "#bbbbff"
 objectives:
   - goal:
-      - Push a monolith onto the base's initial location.
+      - Push a `monolith`{=entity} onto the base's initial location.
     condition: |
       as base {
         teleport self (0,0);
@@ -23,7 +23,7 @@ objectives:
     hidden: true
     optional: true
     goal:
-      - Grab the flower
+      - Grab the `flower`{=entity}
     condition: |
       as base {
         has "flower";
diff --git a/data/scenarios/Challenges/arbitrage.yaml b/data/scenarios/Challenges/arbitrage.yaml
index d5a671d03..c5abd85d8 100644
--- a/data/scenarios/Challenges/arbitrage.yaml
+++ b/data/scenarios/Challenges/arbitrage.yaml
@@ -16,7 +16,7 @@ objectives:
         As an itinerant merchant, you may exploit market asymmetry
         for profit.
       - |
-        Amass a fortune of 100 paperclips.
+        Amass a fortune of 100 `paperclip`{=entity}s.
     condition: |
       as base {
         pcount <- count "paperclip";
diff --git a/data/scenarios/Challenges/blender.yaml b/data/scenarios/Challenges/blender.yaml
index bf452a418..7284caed1 100644
--- a/data/scenarios/Challenges/blender.yaml
+++ b/data/scenarios/Challenges/blender.yaml
@@ -8,10 +8,10 @@ objectives:
   - teaser: Get amulet
     goal:
       - |
-        `grab` the Amulet of Yoneda from the northwest sanctum while
-        timing your passage carefully to avoid Side Effects (X) on patrol.
+        `grab` the `Amulet of Yoneda`{=entity} from the northwest sanctum while
+        timing your passage carefully to avoid Side Effects (**X**) on patrol.
       - |
-        To unlock a red door, `drill` it with the "door key" equipped.
+        To unlock a red door, `drill` it with the `door key`{=entity} equipped.
     condition: |
       as base {has "Amulet of Yoneda"}
     prerequisite:
diff --git a/data/scenarios/Challenges/bridge-building.yaml b/data/scenarios/Challenges/bridge-building.yaml
index 7a972b531..5e81c6cb6 100644
--- a/data/scenarios/Challenges/bridge-building.yaml
+++ b/data/scenarios/Challenges/bridge-building.yaml
@@ -55,7 +55,7 @@ objectives:
   - id: hammer_time
     teaser: Hammer time
     goal:
-      - Produce an obsidian shard.
+      - Produce an `obsidian shard`{=entity}.
     optional: true
     hidden: true
     condition: |
@@ -87,14 +87,14 @@ objectives:
   - id: get_map
     teaser: Get the map
     goal:
-      - As a humble peat farmer, you subsist in a simple cabin by the bog.
+      - As a humble `peat`{=entity} farmer, you subsist in a simple cabin by the `bog`{=entity}.
         Though long content with this ascetic lifestyle, recently the barren walls have
         left you restless. Something is missing...
       - "The majestic landscape that is your back yard is insufficient to distract you---not
-        even the ferocious, lava-spewing volcano little more than a stone's throw from
+        even the ferocious, `lava`{=entity}-spewing volcano little more than a stone's throw from
         your porch.
         You are preoccupied by one task: to find the perfect household decoration."
-      - First, grab a map to orient yourself.
+      - First, grab a `map`{=entity} to orient yourself.
     condition: |
       as base {
         has "map";
@@ -103,18 +103,18 @@ objectives:
     teaser: Find the temple
     prerequisite: get_map
     goal:
-      - You study the map.
-      - Glacier-bound mountains tower in the east,
-        a volcano oozes a river of lava to the north, and beyond that lies a mountain lake, punctuated with islands
+      - You study the `map`{=entity}.
+      - Glacier-bound mountains tower in the `east`,
+        a volcano oozes a river of `lava`{=entity} to the `north`, and beyond that lies a mountain lake, punctuated with islands
         in the northwest.
         Iron mines penetrate the base of the volcano. They could be useful, but how will you get there?
-      - A jungle abuts the volcano, ensconcing an ancient ruin.
+      - A `jungle`{=entity} abuts the volcano, ensconcing an ancient ruin.
         The map notes that bygone travelers have stashed tools among the northeasterly mountains to
         blaze a path through the jungle.
-      - Your only neighbor, a hemp farmer to the northwest, has evacuated since the sudden volcanic eruption.
-      - A disused quarry and clay pit flanks your cabin to the west, as does the familiar, swampy bog to the east.
-        A highly-prized flower is said to grow in the caves beyond the bog.
-      - Your mind is made up. You will pillage the ruins for treasure! Head to the ruins and "scan" them.
+      - Your only neighbor, a `hemp`{=entity} farmer to the northwest, has evacuated since the sudden volcanic eruption.
+      - A disused quarry and clay pit flanks your cabin to the `west`, as does the familiar, swampy `bog`{=entity} to the `east`.
+        A highly-prized `flower`{=entity} is said to grow in the caves beyond the bog.
+      - Your mind is made up. You will pillage the ruins for treasure! Head to the ruins and `scan` them.
         Ingenuity and endurance are your allies as you forge paths through varied obstacles.
         Study your "recipes" for clues!
     condition: |
@@ -126,8 +126,8 @@ objectives:
     prerequisite: find_temple
     goal:
       - "A note on the door says:"
-      - '"Greetings, intrepid traveler. Encircle this temple with the rare "flower" of the southeastern
-        caves, and the treasure of this temple shall be revealed."'
+      - '"Greetings, intrepid traveler. Encircle this temple with the rare `flower`{=entity} of the southeastern
+        caves, and the treasure of this `temple`{=entity} shall be revealed."'
       - Plant a ring of flowers around the jungle temple.
     condition: |
       as base {
diff --git a/data/scenarios/Challenges/bucket-brigade.yaml b/data/scenarios/Challenges/bucket-brigade.yaml
index 30e11f48b..9ccd2b54a 100644
--- a/data/scenarios/Challenges/bucket-brigade.yaml
+++ b/data/scenarios/Challenges/bucket-brigade.yaml
@@ -57,14 +57,14 @@ objectives:
   - id: deliver_coal_lump
     teaser: Get coal to base
     goal:
-      - Deliver a "coal lump" to the base.
+      - Deliver a `coal lump`{=entity} to the base.
       - |
-        To excavate coal from the "lignite mine" (M), a robot needs to
-        `drill` while in posession of a "bucketwheel excavator".
+        To excavate coal from the `lignite mine`{=entity} (**M**), a robot needs to
+        `drill` while in possession of a `bucketwheel excavator`{=entity}.
       - |
         To assemble the excavator, you'll need to repurpose
-        some "treads".
-        Unfortunately, you have only one set of "treads".
+        some `treads`{=entity}.
+        Unfortunately, you have only one set of `treads`{=entity}.
         You'll have to make do...
     condition: |
       as base {has "coal lump"}
diff --git a/data/scenarios/Challenges/chess_horse.yaml b/data/scenarios/Challenges/chess_horse.yaml
index 95b06cb61..f3bbaf677 100644
--- a/data/scenarios/Challenges/chess_horse.yaml
+++ b/data/scenarios/Challenges/chess_horse.yaml
@@ -4,8 +4,8 @@ author: Ondřej Šebek
 description: In this quirky challenge, you move as the chess knight piece. Can you capture the enemy king?
 objectives:
   - goal:
-      - Robots can use the 'move' command to move.
-        But they only 'turn' in cardinal directions. 
+      - Robots can use the `move` command to move.
+        But they only `turn` in cardinal directions.
       - You are special. You are a knight. 
       - Go forth and capture the King!
     condition: |
diff --git a/data/scenarios/Challenges/gopher.yaml b/data/scenarios/Challenges/gopher.yaml
index 5601d4eb5..fb4e81ac9 100644
--- a/data/scenarios/Challenges/gopher.yaml
+++ b/data/scenarios/Challenges/gopher.yaml
@@ -10,12 +10,12 @@ objectives:
     teaser: Defeat gopher
     goal:
       - |
-        A gopher (G) is defiling your immaculate garden!
+        A gopher (**G**) is defiling your immaculate garden!
       - |
-        He will burrow (o) underground awhile, then pop up
+        He will burrow (**o**) underground awhile, then pop up
         anywhere within the rectangular grassy region
-        to gloat atop his "mound" of dirt for a short time.
-        `drill` the "mound" while he sits to drive him
+        to gloat atop his `mound`{=entity} of dirt for a short time.
+        `drill` the `mound`{=entity} while he sits to drive him
         away. Eventually you should wear down his resolve!
     condition: |
       try {
diff --git a/data/scenarios/Challenges/hackman.yaml b/data/scenarios/Challenges/hackman.yaml
index eb45d73f3..1e3ca95cb 100644
--- a/data/scenarios/Challenges/hackman.yaml
+++ b/data/scenarios/Challenges/hackman.yaml
@@ -19,10 +19,10 @@ objectives:
   - teaser: Get pellets
     goal:
       - |
-        Pick up all of the caffeine "pellets" so that Hackman can write more code.
+        Pick up all of the caffeine `pellet`{=entity}s so that Hackman can write more code.
       - |
         Pay no mind to the colorful ghosts meandering about. That is, unless
-        you are feeling generous with your "donuts"...
+        you are feeling generous with your `donut`{=entity}s...
       - |
         Can you find all of the secret objectives?
     condition: |
diff --git a/data/scenarios/Challenges/ice-cream.yaml b/data/scenarios/Challenges/ice-cream.yaml
index c9bb1e454..c1ca97d8f 100644
--- a/data/scenarios/Challenges/ice-cream.yaml
+++ b/data/scenarios/Challenges/ice-cream.yaml
@@ -11,15 +11,15 @@ objectives:
     goal:
       - |
         Congratulations on the grand opening of your new ice cream shop.
-        You have advertised: "All you can eat, for 1 bitcoin!"
+        You have advertised: "All you can eat, for 1 `bitcoin`{=entity}!"
       - |
-        A customer is approaching the "Counter". They look hungry!
+        A customer is approaching the `Counter`{=entity}. They look hungry!
       - "..."
       - |
         Customer: "`give` me a cone, and then I'll tell you how many scoops I want."
       - "..."
       - |
-        Oh dear, you've forgotten to stock your shop with a "calculator".
+        Oh dear, you've forgotten to provision your shop with a `calculator`{=entity}.
         Let's hope this order is simple.
     condition: |
       customer <- robotnamed "customer";
diff --git a/data/scenarios/Challenges/maypole.yaml b/data/scenarios/Challenges/maypole.yaml
index d6e976447..b9df97090 100644
--- a/data/scenarios/Challenges/maypole.yaml
+++ b/data/scenarios/Challenges/maypole.yaml
@@ -19,7 +19,7 @@ objectives:
     teaser: Around you go!
     goal:
       - |
-        Go around the maypole several times counter-clockwise.
+        Go around the `maypole`{=entity} several times counter-clockwise.
     condition: |
       monitor <- robotnamed "monitor";
       as monitor {has "dizzy"};
diff --git a/data/scenarios/Challenges/teleport.yaml b/data/scenarios/Challenges/teleport.yaml
index 1fa88724d..8d39909d8 100644
--- a/data/scenarios/Challenges/teleport.yaml
+++ b/data/scenarios/Challenges/teleport.yaml
@@ -4,7 +4,7 @@ author: Ondřej Šebek
 description: An impossible challenge - can you magically jump across the water?
 objectives:
   - goal:
-      - Get to the other room and grab the lambda.
+      - Get to the other room and grab the `lambda`{=entity}.
       - Oh wait.
       - The tunnel is flooded.
       - Just give up then. It is impossible to get there.
diff --git a/data/scenarios/Challenges/wolf-goat-cabbage.yaml b/data/scenarios/Challenges/wolf-goat-cabbage.yaml
index dd7d8a752..8e888d116 100644
--- a/data/scenarios/Challenges/wolf-goat-cabbage.yaml
+++ b/data/scenarios/Challenges/wolf-goat-cabbage.yaml
@@ -40,11 +40,11 @@ robots:
 objectives:
   - goal:
       - |
-        Ferry all three of the wolf, goat, and cabbage across the lake.
+        Ferry all three of the `wolf`{=entity}, `goat`{=entity}, and `cabbage`{=entity} across the lake.
         However, only one of these can be carried at a time.
       - |
-        Furthermore, if left unattended together, the wolf will eat the goat,
-        or the goat will eat the cabbage.
+        Furthermore, if left unattended together, the `wolf`{=entity} will eat the `goat`{=entity},
+        or the `goat`{=entity} will eat the `cabbage`{=entity}.
     condition: |
       run "data/scenarios/Challenges/_wolf-goat-cabbage/together-on-east-bank.sw";
     prerequisite:
diff --git a/data/scenarios/Challenges/word-search.yaml b/data/scenarios/Challenges/word-search.yaml
index 01e1afffd..8b272f802 100644
--- a/data/scenarios/Challenges/word-search.yaml
+++ b/data/scenarios/Challenges/word-search.yaml
@@ -7,9 +7,9 @@ seed: 2
 creative: false
 objectives:
   - goal:
-      - Use the `drill` command (e.g. "drill down" when on top of the
+      - Use the `drill` command (e.g. `drill down` when on top of the
         intended letter) to mark the sequence of letters that
-        spells COW within the designated playfield.
+        spells `C`{=entity}`O`{=entity}`W`{=entity} within the designated playfield.
       - |
         The sequence may appear horizontally in either the
         leftward or rightward direction,
diff --git a/data/scenarios/Speedruns/curry.yaml b/data/scenarios/Speedruns/curry.yaml
index 9e7c89e8e..5e7cd0157 100644
--- a/data/scenarios/Speedruns/curry.yaml
+++ b/data/scenarios/Speedruns/curry.yaml
@@ -1,7 +1,7 @@
 version: 1
 name: Curry
 author: Brent Yorgey
-description: Race to make a bowl of curry as quickly as possible.
+description: Race to make a bowl of `curry`{=entity} as quickly as possible.
   See the Swarm wiki for more information on Swarm speedrunning.
 objectives:
   - goal:
diff --git a/data/scenarios/Speedruns/forester.yaml b/data/scenarios/Speedruns/forester.yaml
index 1698aa467..d15459f0d 100644
--- a/data/scenarios/Speedruns/forester.yaml
+++ b/data/scenarios/Speedruns/forester.yaml
@@ -1,11 +1,11 @@
 version: 1
 name: Forester
 author: Brent Yorgey
-description: Race to harvest 1024 trees as quickly as possible.
+description: Race to harvest 1024 `tree`{=entity}s as quickly as possible.
   See the Swarm wiki for more information on Swarm speedrunning.
 objectives:
   - goal:
-      - Harvest 1024 trees as quickly as possible!
+      - Harvest 1024 `tree`{=entity}s as quickly as possible!
     condition: as base {n <- count "tree"; return (n >= 1024)}
 robots:
   - name: base
diff --git a/data/scenarios/Speedruns/mithril.yaml b/data/scenarios/Speedruns/mithril.yaml
index c9d24fa0e..d2d03fd7e 100644
--- a/data/scenarios/Speedruns/mithril.yaml
+++ b/data/scenarios/Speedruns/mithril.yaml
@@ -1,11 +1,11 @@
 version: 1
 name: Mithril
 author: Brent Yorgey
-description: Race to mine some mithril.
+description: Race to mine some `mithril`{=entity}.
   See the Swarm wiki for more information on Swarm speedrunning.
 objectives:
   - goal:
-      - Mine some mithril as quickly as possible!
+      - Mine some `mithril`{=entity} as quickly as possible!
     condition: as base {has "mithril"}
 robots:
   - name: base
diff --git a/data/scenarios/Tutorials/world101.sw b/data/scenarios/Tutorials/world101.sw
new file mode 100644
index 000000000..9d0bde51d
--- /dev/null
+++ b/data/scenarios/Tutorials/world101.sw
@@ -0,0 +1,36 @@
+def tB = turn back end
+def tR = turn right end
+def tL = turn left end
+
+def m = move end
+def m2 = m;m end
+def m4 = m2;m2 end
+def m8 = m4;m4 end
+def m9 = m8;m end
+def m10 = m8;m2 end
+
+def mg = m; grab end
+
+def get_3_trees : cmd unit =
+  tB; m; mg; mg; mg; tB; m4
+end
+
+def make_harvester : cmd unit =
+  make "log"; make "log"; make "log";
+  make "board"; make "board"; make "board";
+  make "box";
+  make "wooden gear"; make "wooden gear";
+  make "harvester"
+end
+
+def get_lambda : cmd unit =
+  m10; tR; m9; harvest; tB; m9; tL; m10
+end
+
+def solution : cmd unit =
+  build {get_3_trees}; wait 16; salvage;
+  make_harvester;
+  build {get_lambda}; wait 50; salvage
+end;
+
+solution
diff --git a/data/scenarios/Tutorials/world101.yaml b/data/scenarios/Tutorials/world101.yaml
index 8326a9883..00435a7ee 100644
--- a/data/scenarios/Tutorials/world101.yaml
+++ b/data/scenarios/Tutorials/world101.yaml
@@ -31,16 +31,16 @@ objectives:
   - id: get_harvester
     teaser: Make a harvester
     goal:
-      - Nice work!  Now, use the trees to make a harvester device.
+      - Nice work!  Now, use the `tree`{=entity}s to make a `harvester`{=entity} device.
         This will require several intermediate products; try making
-        various things, and take a look at your available recipes (F3)
+        various things, and take a look at your available recipes (**F3**)
         and at the recipes listed for items in your inventory.  Of course,
         you may end up needing some additional trees.
     condition: |
       try { as base {has "harvester"} } {return false}
     prerequisite: get_trees
   - goal:
-      - Now that you have a harvester, you can use `harvest` instead of `grab`
+      - Now that you have a `harvester`{=entity}, you can use `harvest` instead of `grab`
         whenever you pick up a growing item (check for the word "growing" at the
         top of the item description), to leave behind a seed that will regrow.
       - "**TIP:** since you only have a single harvester device for now, whenever you
@@ -56,6 +56,8 @@ objectives:
     condition: |
       try { as base {has "lambda"} } {return false}
     prerequisite: get_harvester
+solution: |
+  run "scenarios/Tutorials/world101.sw"
 robots:
   - name: base
     display:
diff --git a/src/Swarm/TUI/View.hs b/src/Swarm/TUI/View.hs
index 1fcea7245..3b0be5fcd 100644
--- a/src/Swarm/TUI/View.hs
+++ b/src/Swarm/TUI/View.hs
@@ -887,8 +887,7 @@ colorLogs e = case e ^. leSource of
     Critical -> redAttr
  where
   -- color each robot message with different color of the world
-  robotColor rid = worldAttributeNames !! (rid `mod` fgColLen)
-  fgColLen = length worldAttributeNames
+  robotColor = indexWrapNonEmpty worldAttributeNames
 
 -- | Draw the F-key modal menu. This is displayed in the top left world corner.
 drawModalMenu :: AppState -> Widget Name
diff --git a/src/Swarm/TUI/View/Attribute/Attr.hs b/src/Swarm/TUI/View/Attribute/Attr.hs
index 42427e06a..03ff96071 100644
--- a/src/Swarm/TUI/View/Attribute/Attr.hs
+++ b/src/Swarm/TUI/View/Attribute/Attr.hs
@@ -54,7 +54,7 @@ import Brick.Forms
 import Brick.Widgets.Dialog
 import Brick.Widgets.Edit qualified as E
 import Brick.Widgets.List hiding (reverse)
-import Data.Bifunctor (bimap)
+import Data.Bifunctor (bimap, first)
 import Data.Colour.Palette.BrewerSet
 import Data.List.NonEmpty (NonEmpty (..))
 import Data.List.NonEmpty qualified as NE
@@ -78,7 +78,7 @@ swarmAttrMap =
   attrMap
     V.defAttr
     $ NE.toList activityMeterAttributes
-      <> worldAttributes
+      <> NE.toList (NE.map (first getWorldAttrName) worldAttributes)
       <> [(waterAttr, V.white `on` V.blue)]
       <> terrainAttr
       <> [ -- Robot attribute
@@ -107,42 +107,59 @@ swarmAttrMap =
            (defAttr, V.defAttr)
          ]
 
-entityAttr :: AttrName
-entityAttr = fst $ head worldAttributes
-
 worldPrefix :: AttrName
 worldPrefix = attrName "world"
 
+-- | We introduce this (module-private) newtype
+-- so that we can define the 'entity' attribute
+-- separate from the list of other 'worldAttributes',
+-- while enforcing the convention that both its attribute
+-- name and the rest of 'worldAttributes' be consistently
+-- prefixed by 'worldPrefix'.
+newtype WorldAttr = WorldAttr
+  { getWorldAttrName :: AttrName
+  }
+
+mkWorldAttr :: String -> WorldAttr
+mkWorldAttr = WorldAttr . (worldPrefix <>) . attrName
+
+entity :: (WorldAttr, V.Attr)
+entity = (mkWorldAttr "entity", fg V.white)
+
+entityAttr :: AttrName
+entityAttr = getWorldAttrName $ fst entity
+
 -- | Colors of entities in the world.
 --
 -- Also used to color messages, so water is special and excluded.
-worldAttributes :: [(AttrName, V.Attr)]
+worldAttributes :: NonEmpty (WorldAttr, V.Attr)
 worldAttributes =
-  bimap ((worldPrefix <>) . attrName) fg
-    <$> [ ("entity", V.white)
-        , ("device", V.brightYellow)
-        , ("plant", V.green)
-        , ("rock", V.rgbColor @Int 80 80 80)
-        , ("wood", V.rgbColor @Int 139 69 19)
-        , ("flower", V.rgbColor @Int 200 0 200)
-        , ("rubber", V.rgbColor @Int 245 224 179)
-        , ("copper", V.yellow)
-        , ("copper'", V.rgbColor @Int 78 117 102)
-        , ("iron", V.rgbColor @Int 97 102 106)
-        , ("iron'", V.rgbColor @Int 183 65 14)
-        , ("quartz", V.white)
-        , ("silver", V.rgbColor @Int 192 192 192)
-        , ("gold", V.rgbColor @Int 255 215 0)
-        , ("snow", V.white)
-        , ("sand", V.rgbColor @Int 194 178 128)
-        , ("fire", V.brightRed)
-        , ("red", V.red)
-        , ("green", V.green)
-        , ("blue", V.blue)
-        ]
-
-worldAttributeNames :: [AttrName]
-worldAttributeNames = map fst worldAttributes
+  entity
+    :| map
+      (bimap mkWorldAttr fg)
+      [ ("device", V.brightYellow)
+      , ("plant", V.green)
+      , ("rock", V.rgbColor @Int 80 80 80)
+      , ("wood", V.rgbColor @Int 139 69 19)
+      , ("flower", V.rgbColor @Int 200 0 200)
+      , ("rubber", V.rgbColor @Int 245 224 179)
+      , ("copper", V.yellow)
+      , ("copper'", V.rgbColor @Int 78 117 102)
+      , ("iron", V.rgbColor @Int 97 102 106)
+      , ("iron'", V.rgbColor @Int 183 65 14)
+      , ("quartz", V.white)
+      , ("silver", V.rgbColor @Int 192 192 192)
+      , ("gold", V.rgbColor @Int 255 215 0)
+      , ("snow", V.white)
+      , ("sand", V.rgbColor @Int 194 178 128)
+      , ("fire", V.brightRed)
+      , ("red", V.red)
+      , ("green", V.green)
+      , ("blue", V.blue)
+      ]
+
+worldAttributeNames :: NonEmpty AttrName
+worldAttributeNames = NE.map (getWorldAttrName . fst) worldAttributes
 
 activityMeterPrefix :: AttrName
 activityMeterPrefix = attrName "activityMeter"
diff --git a/test/integration/Main.hs b/test/integration/Main.hs
index a4303ffcb..fe939dc0c 100644
--- a/test/integration/Main.hs
+++ b/test/integration/Main.hs
@@ -199,6 +199,7 @@ testScenarioSolutions rs ui =
         , testTutorialSolution Default "Tutorials/require"
         , testTutorialSolution (Sec 3) "Tutorials/requireinv"
         , testTutorialSolution Default "Tutorials/conditionals"
+        , testTutorialSolution Default "Tutorials/world101"
         , testTutorialSolution (Sec 5) "Tutorials/farming"
         ]
     , testGroup