This is a title and short description, likely for a mobile game app. It's already quite short, and rewriting it without changing the meaning would result in minimal, almost imperceptible changes. Here are a few options, maintaining the original's enthusiastic and slightly repetitive style:
Option 1 (Minor word changes):
Jumpscare Horror Prank Game! Scare Your Friends! A terrifying jumpscare game to prank your friends. Horror and scary gameplay! FREE DOWNLOAD NOW!
Option 2 (Slight restructuring):
Scare Your Friends with This FREE Jumpscare Game! Horror and scary pranks await! Download this terrifying jumpscare game NOW!
Option 3 (More concise):
Jumpscare Horror Prank Game: Scare Your Friends! FREE Download!
None of these options significantly alter the original text's content or tone. The original is already quite optimized for its purpose.