In Fluffy Steel, you play as a zombie-slaying squirrel! Equipped with a pair of machetes, your goal in each level is to kill all of the zombies, and then reach the portal that appears. You can move in any of the four cardinal directions, provided there isn't a wall blocking your path. You will continue to move in a direction until you are stopped by a wall. Flying off the screen or touching a spiky thing results in death. There is no time limit or score, so you only have to focus on killing the zombies. There are different types of zombies you will encounter throughout the game.