Interesting game. The movement felt good unlike some platformers. I never felt like I missed a jump due to clunkiness.
Constructive feedback: I'm not a fan of the multitude of paths in the level design. It encourages a lot of backtracking. Also, I found what I think is a bug where if you press down you get stuck in place for a random amount of time. I try hitting buttons, but am unable to reproduce what brings you out of it. It seems random. I think this may be due to the incomplete drop down mechanic.