A Hack based on Sonic 1 made by Clownacy

It adds Super Sonic and Hyper Sonic to Sonic 1. In addition, you can select from a handful of Super/Hyper music tracks: such as the themes from Sonic 2, 3, & Knuckles.

To unlock Super/Hyper Sonic, you can collect all of the Chaos Emeralds, or select an option on the title screen to enable them from the get-go.

To transform, you jump with one button, and then press a different one while in the air. This will turn you Super. Doing it again will turn you Hyper, and doing it yet again will revert you to normal.