On the edge of the universe, the evil intergalactic goblin Grim Squidge has captured and imprisoned all the stars. He has now scattered them across to faraway planets. While this is happening, a nearby space station picks up a distress signal. Tinhead, guardian of the edge of the universe, hears the cries for help and hurries to the rescue.

TinHead is a platform game. Some exploration is required to find the exit or gather extra health or points. Attacking enemies is done by shooting them with small metal orbs that come out of TinHead's head. He can shoot them in three different directions: diagonal upward, straight, or just let them jump out and bounce over the ground. The direction is chosen by using a specific button.