Some scripts simulate touching every checkpoint in sequence within seconds, which triggers the game's "win" state.
These scripts often ruin the experience for others in multiplayer races and can cause game servers to crash if not written correctly. Alternative: Learning to Build and Script Very Easy Parkour Obby Instant Finish Script
Many "free" scripts found on forums or YouTube contain malware or account stealers that can compromise your personal data. Some scripts simulate touching every checkpoint in sequence
Instant finish scripts typically function by manipulating your character's position or interacting with game "RemoteEvents": Very Easy Parkour Obby Instant Finish Script