Is it a bug that you don't get the midair jump if you don't jump off the ground first? Feels a bit unnatural and caused me to die quite a few times. It would also be nice if you got it back after bouncing off the bouncy platforms.
I also think the game could have used it mechanics more and in combination to make some really cool levels, but I understand that level design is hard enough without a time limit.
Anyway, fun game!