man, just an idea, you could make a mania style version of the fan game.
more animations (some that resemble "mania"), smooth rotation, spring twirl (optional), mania-style background, etc.
good work, i liked it.
you can also make a remake of the sonic 2 master system (like - sonic 2 8 bit in 16 bit) with an engine based on mania.you can think of cool things to add.
what would spring twirl look like in this remake?(you can test to see if are good or not