Here is some of my feedback for the game...
The largest issue I've found is being required to move with the moving platforms, it makes the moving platform puzzles some of the hardest in the game, especially the one where you have to stand on the moving enemy, all of my score was drained by the time I got past that one
Another issue I found while playing is bouncing
occasionally when jumping, and landing on the ground you will bounce, which sometimes leads to me pressing the jump button and not jumping, even though it looked like I was on the ground
Another issue is getting stuck on walls, particularly walls above spikes... for some reason
A minor problem is there only being one jump sound effect, after a bit it gets old
and it doesn't help that in many situations you are constantly jumping
That's some of the problems I've found when playing