Good game! As a huge Sonic the Hedgehog fan, I am happy to see that there is a hub world and each character respectively to their own roles. I found the controls to be rather sensitive and slippery, but the game is playable. I like how you used music from Sonic '06, because that game did have really nice music. I also have to praise your use of 16/32-bit graphics, it really adds to that classic feel.
If anything, you could update the controls and/or the cutscenes.
Thank you! :D
~Hannah