Skullhammer is a fun little platformer, which shows potential as full-fledged platformer. The mechanics work most of the times well. Sometimes I wasn't able to attack with the hammer when I stood one block higher than the block in which direction I wanted to swing the hammer. Also, when you hit a switch, maybe you could add some kind of sound to know that triggering the switch had an actual effect. Graphically, I loved the pixelart, which reminded me of the SNES-era.