Sonic Double Dash is a hack based on sonic 1 that greatly revamps the first zone into something that you'll hopefully consider fresh and fun. Technical changes are relativly minimal as the hack has a greater focus on creating new layouts and artwork. The levels are built with the new double dash in mind, a redesigned drop dash that's power can change the flow of how you play, epscially useful for speedrunners or those who just want to have a good time. Forget that last part as it makes this sound like a dating profile.