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