This is a hacked version of Sonic the Hedgehog. The title character is replaced by his sidekick, Miles "Tails" Prower. The levels remain unchanged.
There is more than just an appearance change to this game. Tails' abilities remain intact. If you haven't seen Sonic the Hedgehog completed before, you may wish to do so before seeing what a character with flight and a spindash can accomplish.
In this run, marzojr improves his previous attempt by 00:57.82 seconds.
There is a run with Knuckles in Sonic the Hedgehog hack, It replaces Tails with Knuckles and flying with gliding.
There is also the original run of Sonic the Hedgehog done by Aglar in record time without the advantage of spindash and gliding/flying.
Note: An IPS patch for the hack can be downloaded here. It must be patched to REV 00.
There is a secondary YouTube encode that has the camera hacked so it stays on Tails even when he's off-screen.