Use the arrow keys to move, while down to brake. A is to jump; press S while airborne to dash forward. Hold S to charge a Spindash; release to roll forward at high speed. Make sure to collect some rings, because if you take a hit while holding even a single ring, you won't die. ā You don't have a speed limit, so I decided to make it so that the faster you moved, the more effects kicked in. Plus, if you go quickly enough, you'll get something pretty cool and game-breaking! Enjoy!
Just wanted to try something with a 3D perspective to see how it'd work, and despite how rough it looks, I think it turned out alright. The sprites used for Sonic come from the infamous cancelled "Sonic X-treme" for the SEGA Saturn. Songs come from various Sonic titles. EDIT: LOTS of major perspective edits to make it look better.