Fun game! I enjoyed the mechanics and the general concept of it. Having to die to prove you are the player is a nice touch and was pretty funny.
If you wanted to improve, the shooting could be a little better, it was hard to hit blocks sometimes and requires a lot of jump precision shooting. Also, sometimes spacebar would work for jumping, other times it would not, I think it has something to do with the light and dark version of the character.
Overall, fun game!