Complex sentence: Back in Pac-Village, Spooky creates an uproar, and Pac-Man has to defeat him, upon which Spooky will be re-imprisoned, peace will return to Pac-Land, and the ending sequence with the credits is played.
Split into simpler sentences: Back in Pac-Village, Spooky creates an uproar, and Pac-Man has to defeat him. Upon this, Spooky will be re-imprisoned, peace will return to Pac-Land, and the ending sequence with the credits is played.