Fun game, very difficult but satisfying to beat. Controls were pretty intuitive and movement is fun. The level design was good, but I think it would be worth having some easier levels before 2-4, as they jump pretty dramatically in difficulty before you can get used to the controls. The spikes feel a little bit punishing given that they immediately end your run; maybe they could deal a set amount of damage and bounce you back a bit, reducing your limited time instead of just ending the game.