Controls
Menu: Up arrow to go to instructions page. Up arrow again to start game.
Game: Up/down/left/right arrows to move. Z to set off green shockwave, X to set off blue shockwave.
Mechanics
Shockwaves will sweep away the rocks of the same colour, but your ship is vulnerable to either kind so you had better sweep carefully! Watch the cooldown marker in the bottom left corner.
Commentary
Bah I was doing so well with my 2D board game thing from a few nights ago but I really didn't have enough time to make it happen so this came together just today. It's an awful mess in many ways but came out better than it might have done.
itch.io page: here.