Press space to send out rays. They highlight everywhere they can reach. Press Q to spray spraypaint. It can permanently mark a wall close to you. Hit E to enable flashlight. Hit R to fire a line. It creates a concentrated line. Don't touch the eternal darkness... If you get to the edge, you progress to the next level.
Update log: 0.1: Base game. Added rays, the dark kills you. 0.2: Added spray paint, SFX, counters, and ending. 0.3: Added flashlight toggle. 0.4: Added lines, fade, and range.