The Simpsons: Bart vs. the Space Mutants is an action-adventure game that takes place on the planet of Springfield, where Homer's favorite donuts have been stolen by aliens. The evil alien leader, Brainy, has kidnapped Lisa Simpson and is holding her for ransom in his spaceship. It's up to Bart to rescue his sister with the help of his trusty skateboard.
Gameplay involves navigating through increasingly difficult levels of the alien's space station, avoiding obstacles and enemies while collecting power-ups and avoiding being captured by Brainy's robotic guards. The game features a variety of environments, including zero-gravity areas and moving platforms, which require quick reflexes and timing to navigate successfully.
The gameplay is fast-paced and challenging, with an emphasis on exploration and platforming skills. As players progress through the levels, they'll encounter new obstacles and enemies, as well as power-ups that give Bart temporary advantages, such as increased speed or invincibility.