The game is a 2D platforming game. You can play as Sonic, who can utilize the spindash and other various moves. Sonic now has the ability to double-jump, allowing him to access higher platforms. Knuckles can glide through the air and climb walls. You fight Doctor Eggman (aka Doctor Robotnik) at the end of each zone's second act. You must find all of the Chaos Emeralds in the second act of each zone to find Doctor Eggman and win the game.
The first zone's boss is the Eggmobile.
The second zone's boss is Prodding Spear Mech.
The third zone's boss is a ball and chain robot.
The fourth zone's boss is a Submarine Fighter.
The final boss is an Eggmoble with lasers.