I like the concept of the game and it looks pretty good, but it feels a bit unfair and the game over mechanic seems unnecessary. I think it's safe to say you took some inspiration from Super Meat Boy. The thing that makes SMB work for me is the quick respawn, satisfying death effect, and how fair it is. Yeah, it's unforgivingly hard, but the movement is super crisp and the hitboxes are super clear and a tiny bit forgiving. I think with a few tweaks to those aspects and a few easier levels to ramp up to the difficulty you have now, this could be a really fun game.