The movement in the game is very cool (like a mix between jump king and cleaning the system) and felt pretty fun when you got it right. The control scheme isn't great, having to mash the buttons to change directions was pretty annoying and the j/f keys were awkward (maybe a, d, w instead?). Sometimes the nail would get off the ground when you were leaning and you wouldn't jump. I think some 'coyote jump' feature where you could still jump a little after leaving the ground would've been nice. I beat all 3 levels, and I think that you could've eased the player into the difficulty of the second 2. The ability to die felt out of place, and was more frustrating than just falling and losing your progress. I also encountered a bug twice in the second level where the hammer clipped into the ground and I got softlocked. The movement was actually pretty fun when it worked like the jump at the end of the 3rd level where you need to lodge the nail head on the post was a super cool idea (the two falling platforms were pretty diabolical though). I think with a little more polish and a better difficulty curve this game would make this game would be easier to get into, but the movement and level design is still pretty great. I hope you keep on making games and improving!