Cool game!
The way the chests appear reminded me a lot of the game my team submitted.
I found the game a bit too easy. Increasing the number of ghosts didn't make much difference, since they all followed the same path. I think it could become more interesting if each ghost behaved a little differently, kind of like in Pac-Man, where every ghost has its own chasing pattern.
The graphics are cute, and the music is simple but nice. Good work! :)