Hello,
This game is pretty fun to play. The minimal concept is quite simple to pass time, however, there are a few things you should have a look into, first, for some reason sometimes the player after completing a jump stops for a while and then moves, it feels like the momentum breaks at that time, secondly, the player slides over the ground sometimes, and also try checking for the spikes game over event, as one of the spikes just pushed the player away instead of ending the game.