After several attempts, I made it all the way to level 6! This game is pretty challenging. I like that you can jump on enemies as well as hitting them. I was surprised to see my life refilled after each level (otherwise there's no way I would have made it past stage 2). I really like the art as a whole, and gameplay is pretty clean and crisp feeling. I wish the hitbox for the pickaxe was a little bigger, though.