I liked some of it though I dont have the patience for the repetitive bits.
Nearly gave up on 1st red (struggled to jump without hitting red) and did on second red.
I had to reset on going up the red barrier as I died too high and couldnt get to it subsequently and by the time I got that done and then would have to keep dieing on the final way to the door was too much.
May be an 'Undo' if you feel you've mucked up rather than a full reset?
And may be only a 3 or four deaths needed for a level to get completed?
I also prefer a separate jump button option than just using the keys (and I wonder what or where S does something!)
As mentioned by others it does need some noise.
Good effort as it does have potential

This is a cool game! M only big complaints are that there's no sound and that at certain points with the corpse platform mechanic, it was pretty easy to lock yourself out of actually being able to win, which would mean you'd have to reset the whole level, which was pretty frustrating as it represented a lot of time lost and meant you had to do the same setup all over again. I think the level design probably should have been set up so that it was harder to get into a situation where you have to reset, as that gets frustrating. Still though, this is a really cool game with some really cool mechanics.

I would have really enjoyed some audio. And it was so frustrating to fall off of the ledges. But it was very fun and kept me playing. Good job!