This is pretty fun! It took some playing to figure out...I would have liked to see some basic instructions so I could jump into the action sooner. I like all the weird level features, admittedly a lot of them seem to come from Sonic, but as we all know imitation is how games get made! It has a cool semi-cute-semi-horror aesthetic, the tunes are good too. There were a few bits where it almost seemed more like Tony Hawk than Sonic, which in my view is good, since a bit of variety in the gameplay is a good thing. That brings me to my next point; is the idea to collect all the souls? Then you could make it a puzzle to go through the level and find all of them; this would contrast with a purely Sonic-type game where you just try to get through to the end.
I guess there are a lot of different ways you could expand this game. I think it'd be cool to see it develop!