Ok, knowing that, I got a bit farther, but the controls for keyboard are still pretty bad. Hit & sprint on the same button are not good. And I stuck on the level where you need to jump from a slow vertically moving platform to a fast horizontally moving one. It's just impossible, at least on keyboard, or I'm missing something mechanics-wise. Plus, is walljumping a bug or a feature? I dunno, but it still barely helped with that platform... I got on it once and didn't make the final jump, and I never repeated that success.
So, my verdict - it needs a tutorial, maybe a better control scheme (or at least a "Gamepad very much recommended" or something written in the menu) and some playtesting&polish (which is applicable to most, if not all games on gamejams). I changed my rating to a higher one still