Ooooh, this is pretty! The only major point of criticism I have is that the animal in the title image looks more like a very cute rabbit than a very cute cat, but I'd also be very happy to play a game about a very cute undead rabbit stuck between the worlds of the living and the undead, so I think I can be forgiving here ;)
Seriously though, this is very nicely produced and has some really nice melodies. Also, I'm always a huge fan of iv-I progressions (and cute animals), so you've already won my heart with that.