Interesting idea! I have a small gripe in that I didn't really like that on normal mode my past self seemed to still speed up against me. I am notoriously bad at racing games so figured I'd have an easy race against myself for the second lap because past me, the noob, would be crashing into every corner or taking them wide and learning the root, but he zipped off care free with utter disregard for the walls with which I had collided! I though perhaps I had hit hard mode by accident so after several failed attempts to beat myself I tried another really purposefully slow lap. TO which I watched myself who I figured sucked at the game suddenly become sonic himself! It did leave me laughing and I still had a good time with it, but I would have preferred it I think if past me really had truly been my past ghost. Good job though, I liked the art and the race tracks route :)