Great, but it needs a tutorial!
This game is very well-made, and I especially appreciate the ability to customize the keys, but it simply poor design when you assume that players will know how to perform complex maneuvers on the very first level without any sort of explanation at all.
It took me a full five minutes to figure out how to use dash and jump in combination to scale high walls--and while that got me from one end of the screen to another, I now can't figure out how to get past the part where there's a high ledge but no wall to dash-jump up. Rather than spend another five minutes of my life figuring out what combination of key presses will allow me to advance, I simply gave up, as I'm sure many of your players will. It's too bad, really.