Music is good. Some good platforming challenges there (falling platforms, small platforms, spikes, moving spikes, minimal view jumps, and timed doors. I feel though you could have separated them a little to begin with. maybe dealing with one type at a time and adding them together later down the line when you get used to the player movement. Good designs just a little too much too soon combined with imprecise controls. the music and sound effects a really good here well done