Andromeda Invaders

The real one-file Canvas game from the SanzCloud Arcade, embedded here without the production analytics and score hooks.

One document, full game loop

This game was the best portable Arcade slice: HTML, CSS, graphics, input, collision, bitmap type, and Web Audio all live in one document. The local copy only removes lobby plumbing, so the playable system remains the upstream game.

Move with A/D or the arrow keys. Fire with Enter, pause with Space, and mute with M. The on-screen controls work on touch devices.

Arcade game: Andromeda Invaders 0.9.0
Renderer: Canvas 2D primitives
Dependencies: None in this embed
License: MIT, Susam Pal

The game is sandboxed inside this page; keyboard focus moves into it after a click.

What the implementation demonstrates

Procedural pixel art: player, enemies, projectiles, and boulders are rectangles drawn at integer coordinates. No sprite sheet is required.

Geometry as game logic: the same width/height constants drive both drawing and axis-aligned collision tests, so the visible shapes and hit boxes stay synchronized.

A complete tiny rendering stack: an 8×16 bitmap font renders score and status text; the canvas scales responsively while retaining its 640×480 coordinate system; oscillators and gain envelopes synthesize sound.

Production idea: when drawing, input, timing, and collision all share one coordinate model, a small Canvas system can remain understandable even after it becomes a complete game.

Embedded from arcade/site/games/space-invaders/index.html. Andromeda Invaders is MIT licensed, © 2022–2023 Susam Pal; the Arcade copy adds SanzCloud lobby integrations, removed from this isolated embed.