We'd like to change menu colours a bit, because you need to look closely to understand which level is unlocked. Little bug with spikes, the cube touched it and if you press jump instantly (or just move by acceleration) - nothing will happen (except particles). There's levels where you don't need all 3/2 jumps, level can be passed by one. Maybe you want to add some type of counter to check how much jumps left and reset it every time player touches the ground?
Overall, we love the music, mechanic, style and big thank you for your submission. Keep it up!