Cosmos Boulders

Cosmos Boulders is an arcade-style HTML5 minigame built with reducers and immutable data in ES5 JavaScript.

It is playable with keyboard only. The key mappings are:

  • Insert coin: 5
  • Start: 1
  • Fire: Ctrl (left or right)
  • Thrust: Up Arrow
  • Rotate left: Left Arrow
  • Rotate right: Right Arrow

If your keypresses seem to be ignored, try clicking inside the canvas to make sure it's got the keyboard focus.