Good story and good idea, there are just some things to point out:
- The character dosen 't flip or turn when you move to the left
- If you fall out of the map you just keep falling for ever
- And you can use the hover ability to fly anywhere you want so that is a bummer
I feel that if you tried to work on the game a bit after the jam you could see a major improvement of the game, but there is almost nothing (other than the story, which is great btw) to separate it from other games, all I am saying is that you should try to add a new cool mechanic that would change the game. Perhaps you can use the souls for something else, maybe make more of them and use them as extra lifes; they give you a bonus mechanic, but they disappear if you take damage or something like that.
There is a lot to work with, just try to focus on the three main problems I told you about first. A great idea, just needs a bit of polishing.