The story of Faceball 2000 revolves around a H.A.P.P.Y.F.A.C.E., or Holographically Assisted Physical Pattern Yielded For Active Computerized Embarkation, who must navigate through flat shaded corridors to find the exit in each level. Enemies are simple geometric shapes with smiley faces on them, adding a touch of whimsy to the game's dark premise.
The gameplay of Faceball 2000 is fast-paced and action-packed. Players control their H.A.P.P.Y.F.A.C.E. as it navigates through mazes, avoiding enemies and finding ways to escape. The game features two modes of play: single-player mode, where the goal is to find the exit in each level, and multiplayer arena, which allows up to 4 Game Boys to be linked together for a competitive experience.