I loved the sprite for the main character. IMHO the music is not fitting for the game so much, I'd expect a less calmer music as you devour the souls (of children? did I read that right?). - or a sadder one
I miss a quick restart button at Game over screen, that would have been nice.
I like the general idea and with some high score/leaderboard system this game would rock. I noticed that the sould get sad when you move close to them. I really appreciate all these details and the love you put into it.