I completed the game in hard.
The game is very well rounded, the presentation, both visuals and music, is nice, I like the very smooth movement of everything, it's dynamic and fun, the levels are different and are fun to apprehend, the speed of the obstacles feels right and with the difficulty levels the difficulty level is as you see fit which means it's consequently right on point.
Very cool game. It could for sure be developped into something bigger too.