One of my favorites I've played so far. You get a ton of mileage out of the mechanic and it feels great, awesome work!
I do think I got permanently stuck in a room on the left side - there's a spot where you need to place an anchor down to pick up a fuse, but if you die before you get to the fuse, the anchor spawns somewhere you can't get back to, if you got the checkpoint right after it (the room that you need to be holding the anchor to protect your head from the spikes). I'm sure this would be an easy thing to fix.