Awesome game
Just may complain that the difficulty is very high for a "normal difficulty" on the first levels so it can be frustrating. Also sometimes the jump hitbox is weird or extremely preciset(specially on the first level on the dark phase, it seems it always gets hit when trying to jump the bumps). Maybe those tiles are bugged i think
Also you can't jump when changing lanes(only when the jump ends, but you can change lanes mid jump)
it makes even more difficult in some situations
And the difficulty button is hard to spot, at first one doesn't think it was a difficulty selection at all.
Outside that, i think this game is too good to be free.