In Time Killers, players control a character as they travel through time and attempt to stop the evil Dr. Kipper from using powerful time machines to erase history. The game features a unique control scheme that allows the player to move their character around the screen using a joystick. The player can also choose to shoot projectiles at Dr. Kipper, or use their time machine to travel back in time and stop him from completing his plan. The game is also packed with features, including a variety of bonus levels, a selectable difficulty level, and a game over screen.