laser game

WASD or arrow keys for movement
Z: undo 
R: restart
Q: interact: When standing on those fancy blocks, press Q to go into that level. Once that level is complete, you'll unlock the next level. You can press ESC to leave a level without completing it.
TAB: go to overhead camera in the overworld
F: if you want to skip a level, press F while standing on a level instead of Q to 'solve' the level


Source code: https://github.com/yudkowsky/cereus