Very nice! I love the mechanics! The touch of the lights flickering too is perfect. A few comments though: 1) on level 6, the key box partially covers the signal, so it's not immediately clear to signal right. 2) on level 1, putting the checkpoint right next to the spikes does mean more people will hit it, but I also means when they die during the dash, the continue holding right and will walk into the spikes. 3) the top half of the door doesn't have collision, so it sucks to dash through when speedrunning. 4) The time encourages speedrunning, but it would have been nice to have a "reset the whole run" button. Maybe hold R for a second or something? Altogether, really good though!