Great work! I think the concept is great, and that the art style fits it well. The timing mechanic was cool, and I was able to complete most of the levels without too much difficulty. And using respawning as a puzzle mechanic was a great idea. The two things I'd suggest working on if you were to improve the game are that one, I think the hammer should activate a bit sooner. The delay in the animation makes timing up the hits pretty difficult, especially when falling. And two, on the 9th level, I think touching the lava should just restart the level, not make you respawn in a box and sit there until the time runs out. But great work!