Cool game, loved the visuals and the audio had a nice retro feel to it that matched well. The spinning trick is neat and I like that it can double as a kind of sprint button, but that you have to be careful with it as you risk bumping into a wall and losing momentum.
I felt that the wall sprites kind of blended into the background and it took me a second to realize they were barriers, but I got the hang of it. I also would sometimes get stuck in the wall when using the spin attack, usually I was able to unstick myself by spinning again, but not always.
I had fun with this game though, really good job :)