The Earth was attacked by the aliens and only Bart is able to get rid of them. Move through the city and dodge aliens, completing all levels and showing that this is not a place where they should land.
Have you ever met Bart before? No? This is a simple boy, but by some reason he was chosen to deal with the hostile aliens that came here to capture our world. You should show them true powers of the men and point your finger on the door. They should understand that this is not their planet and they have to leave.