Green Hill Zone consists of a single platform that allows fighters to walk off past the blast line. The centre of the stage is a large depression. Attacking the ground in the depression can destroy it, temporarily creating a large pit in the centre of the stage.
The background of the stage features a shuttle loop and an item box from the original Sonic the Hedgehog game. Occasionally, Knuckles the Echidna, Miles "Tails" Prower, and Silver the Hedgehog - whom debuted in Sonic the Hedgehog 3, Sonic the Hedgehog 2, and the 2006 Sonic the Hedgehog, respectively - may run through the shuttle loop.
As previously mentioned, a segment of the main platform can be destroyed to create a pit. This is not the only hazard the stage has, however, as the Checkpoint post from the original game may rise from the ground at times. Though it appears blue, it will turn red and begin to spin should it be attacked, dealing damage on contact as it continually spins. Eventually it will stop spinning, and even later still, will leave the stage.