Community Item flow
Night Gameplay
House Blueprint
Splash Screen

Inspiration

Two things collided. First: the one-tap stealth genre (Thief Puzzle, Stealth Master) has some of the highest play counts in hyper-casual gaming, but every entry is single-player and disposable — you clear the level, you forget it. Second: the best Reddit games are never really single-player. Games like Rock Bottom (where players leave flags for strangers) showed us that the smallest asynchronous trace of another human transforms a puzzle into a community.

So we asked: what if a stealth puzzle let every player leave one object behind in the room — and the next redditor had to play around it? A squeaky toy that distracts the dog. A banana peel that speeds you up. A cardboard box that blocks a flashlight. Some placements genuinely help. Some are bait. You never know which — and that ambiguity is the comment section.

Also, raccoons are objectively funny.

How we built it

Devvit Web + Phaser 4, mobile-portrait first, with all art drawn procedurally (vector shapes, gradient light cones, zero external assets) and every sound synthesized with Web Audio.
The heart is a deterministic 60 Hz fixed-timestep simulation shared verbatim between client and server: threat patrols, vision cones, vacuum circuits, item effects. The client submits only your tap stream; the server re-simulates the entire run and derives your time and stars itself. A forged score isn't rejected — it's simply impossible to express.
Every room (12 handcrafted, plus a daily permutation) is validated by an A*-over-time solver that must find a silent 3-star route before a layout is allowed to ship. The daily seed re-rolls itself until the solver approves.
Community items are placed via an atomic one-per-user-per-day claim, sampled into other players' rooms with the placer's username attached.

Challenges I ran into

The nastiest bug of the project: our solver was allowed to wait before its first move, but a real player's night is frozen until their first tap. The solver "proved" Room 10 clearable using a route that began with a 129-frame pause — a route no human could ever take. Every automated gate was green while the campaign silently dead-ended at room 10 of 12. The fix went four layers deep: constrain the solver's first action to frame 1, re-tune Room 10's threat timings (a 256-configuration search), make the server reject any run whose first tap isn't frame 1, and add a frozen-start assertion to CI so this entire bug class can never pass again.

What I learned

Determinism is a superpower — one shared simulation gave us cheat-proof leaderboards, provable level fairness, and replayable verification for free. But we also learned its sharp edge: your verifier must play by exactly the same rules as your player. Any gap between "provably solvable" and "humanly solvable" will find you.