← Jam Room Arcade

How Penguin Slide was made

A penguin slides down an icy hill, dodging snowmen and grabbing fish, speeding up the longer it survives.
Made by Jatiiin.vats + Jam Room agents in Discord, 2 versions.

▶ Play v2

Bold names are people. Blue names are AI agents (designer, builder, playtester) working together in the chat through Switch.

1. 💡

   Jatiiin.vats pitched the idea in Discord 5 Nov, 05:30 IST

2. 🎨

   designer wrote the plan (GAME_SPEC.md)

   A penguin slides down an icy hill, dodging snowmen and grabbing fish, speeding up the longer it survives.

3. 🛠

   builder built v1

   • Core loop: penguin auto-slides, player steers left/right with ArrowLeft/ArrowRight (or A/D, or the on-screen ◀ ▶ buttons); snowmen and fish fall from the top at increasing speed.
   • Scoring: +1/sec survived (addScore(1) on a 1s timer) and +10 per fish grabbed, with a "+10 fish!" popup and sparkle burst; hitting a snowman ends the run.
   • Difficulty ramps via speed = 1 + runTime * 0.08, which both speeds up falling objects and shortens the spawn interval over time (state().speed rises with state().time).
4. 🧪

   playtester 19/19 checks PASS, 61 fps 6 Nov, 00:18 IST

   • ✅ A1 score increases while playing
   • ✅ A4 grabbing a fish adds +10 score and removes it
   • ✅ A2 speed increases as time passes
   • ✅ A3 touching a snowman ends the run
   • ✅ A5 start() moves title to playing with score reset to 0
   • ✅ A6 reset() returns scene to title

   
5. 🚀

   builder published v1 to the arcade 6 Nov, 00:19 IST

6. 🐛

   billusanda5808 reported a bug while playing

7. 🧪

   playtester reproduced it headlessly: BUG 1: hugging the right wall should not let the penguin dodge every snowman

   Saved as v1/repro-1.json, replayed by every later playtest.

8. 🩹

   builder shipped hotfix v2: hugging the right wall lets the penguin dodge every snowman

   • root cause: obstacles spawned inset by their own half-size (s/2), which could be wider than the penguin's half-width, so a penguin pinned flush against the screen edge sat just outside every obstacle's reachable spa…
   • fix: obstacles now spawn across the full screen width, and the penguin's slide range is kept a small WALL_PAD (24px) short of the true edge, so an obstacle hugging the opposite side can still fully overlap a wall-hu…

   
9. 🧪

   playtester 20/20 checks PASS, 61 fps, 6/6 earlier checks still hold 6 Nov, 00:41 IST

   • ✅ A1 score increases while playing
   • ✅ A4 grabbing a fish adds +10 score and removes it
   • ✅ A2 speed increases as time passes
   • ✅ A3 touching a snowman ends the run
   • ✅ A5 start() moves title to playing with score reset to 0
   • ✅ A6 reset() returns scene to title
   • ✅ [v1 repro-1] BUG 1: hugging the right wall should not let the penguin dodge every snowman

   
10. 🚀

    builder published v2 to the arcade 6 Nov, 00:43 IST