I find the game pretty hard, but in an "unfair" way. You don't see the ghost often until it's too late, and it's sometimes just impossible to avoid it. The game crashing whenver you die also makes it slightly annpoying i think, but i don't know if it's intended or not to crash.
Also i don't know if i died or it just crashed at some point i don't really get why since the ghost wasn't there.
Last negative point, i didn't really understant the theme implementation.
I gotta say i like the idea of the game tho!