This was a fun little game. You have a great idea that was implement very simply and cleanly. I agree with the other people here. That you needed some feedback on when you are taking damage. Maybe your ghost could start to fade out as it gets more hurt. There could be a squiggly outline around the player when taking damage. I feel like you missed an opportunity to use some really good sounds you could have made yourself, like some funny "Boo!" or "Mahwahahahaha" lines. That would have really amped up the feel on this game.