Cute character and fun music, but the controls are terrible. Character was stuck almost at once, facing a wall. Managed to go the other way, stuck again on the edge of a block. Got off the block and fell in a hole, and the game is essentially crashed — none of the controls do anything. Looks like if the character's face is against a block, you can't jump, or turn around. No way to restart without refreshing the page either.
Tried in full screen, same problem, but now the "leave full screen" button also didn't work.
Might be my OS (OSX) or browser (Firefox), but this felt like it needed more control testing.