Done so far:

– Planet geometry

– Rover controls to move, drill, and shockwave

– Crappy sprites for player and obstacles

– Shockwave and drill collision detection

– A few Web Audio sound effects and manager

Still to do:

– Enemy rovers & combat logic

– Neutral characters

– Music

– Most sound effects

– Most graphics

– HUD

– Menu and level organization

– Maybe some cutscenes or animations