Hi ! I like the art, and the sfx is simple but fun :)
The gameplay is original and interesting but for me, having so select the color AND move the light by moving the mouse makes the game too difficult. I would have assigned the colors to 1, 2, 3, 4 (or &, é, ", ') keys to avoid this frustration. It results in cognitive overload for me (as an autistic player).
I also noticed the mobs don't get damaged before they're damaging me too so it's very difficult to survive.