Sonic 1 - The Ring Ride 1 is likely part of a series of ROM hacks based on the original Sonic the Hedgehog for Sega Genesis. Each installment in the "The Ring Ride" series might present a unique level or gameplay challenge with a focus on collecting rings.  The original Sonic the Hedgehog (1991), by Sega, is a platformer known for its ring-based scoring and progression. These hacks focus on the game's ring-collecting mechanic, possibly emphasizing creative new level design built around that mechanic.  Further information on the creator or specific gameplay mechanics is often limited on ROM sharing sites.

Sonic 1 - The Ring Ride 1

Sonic 1 - Rerouted