Not bad for 2 hours! Probably I would make the character bigger, so it looks more the like the logo. So if the design is simple, then big pixels. I would add sounds and a background music, just a little effort but big benefits. Then I would try to implement the limitation transforming the player into a ghost/zombie/skeleton depending on the way he dies, and the possibility to recover depending on what you pick. So, the player never dies, he just evolves.
So if you made this in a couple of hours, now imagine it with 70 hours of polishing. I wish I had this idea in the first place, haha.