Atom Trap: Neon

Trap bouncing atoms by building walls, clear 75% of the chamber, then move on to the next level. Atom Trap is an installable web game (PWA) built with TypeScript, Vite and PixiJS.

Play: https://todilo.github.io/atom-trap/. On Android, open it in Chrome and choose Install app.

Android app: built with Capacitor on GitHub Actions for Google Play; see store/README.md and ADR-0020.

How to play

• Goal: trap the bouncing atoms by building walls. Clear 75% of the chamber to reach the next level, and each level adds an atom.
• Touch: put your finger where a wall should start, then swipe. Sideways builds a horizontal wall, up or down a vertical one.
• Mouse: left-click builds a wall, right-click switches between vertical and horizontal.
• Careful: a wall is fragile while it grows. An atom that touches it breaks it and costs a life. Bigger clears earn bonus points for coverage above 80% and 90%, lives left and time left.
• Continue starts at your highest level, but the score doesn't count for the high-score table.
• Speed: Slow (title screen) runs at half speed for half points, like the original's Slow option. Music, sound and vibration have their own switches, and Theme cycles through five colour schemes (Neon, Synthwave, Toxic, Ember, Ice).

Develop

npm install
npm run dev

npm run build type-checks and builds to dist/. Every push to main deploys to GitHub Pages.

Docs

• CONTEXT.md: the domain glossary
• docs/classic-rules.md: the Classic mode rules spec
• docs/adr/: architecture decision records

Credits

Atom Trap's Classic mode is inspired by JezzBall (Dima Pavlovsky, Microsoft, 1992). Atom Trap is not affiliated with or endorsed by Microsoft, and the JezzBall name is not used in the game. All code, art and sound in this repository are original.

Open-source software used in the game is listed with its licenses in public/licenses.txt (npm run licenses refreshes it; the build does too).

License

Copyright (c) 2026 Christian Klinton. All rights reserved: the code is public to read, not to reuse. See LICENSE.