The dash feels a little off, given that you lose momentum when using it - meaning if you're trying to use it to cross a gap, you sometimes just smack into the wall and drop. Not sure if that was just a "me" problem, though, so it might just be my timing never lined up right.
All in all though a really fun little speedy platform game! I'm not much for speedrunning strats and such, but this one is quite fun. Definitely a pretty solid proof of concept.