Ghost

The Ghost is a special enemy in Fidel Dungeon Rescue. Each level is timed, and if you run out of time, the Ghost will spawn and chase you down your leash. The exact mechanics of this vary a bit by the level type:
 * Main Levels -- you have 240 seconds per level, and death-errors reduce this timer significantly.
 * Underworld Levels] -- you have 320 seconds per level, and death-errors spawn the ghost immediately, but the ghost moves slower.
 * Speedrun Levels -- you have 3 seconds, and death-errors will increase the speed of the ghost.
 * Puzzle Levels and Centipede Levels -- no ghost.

Disabling the ghost
If you beat the Speedrun Levels (unlocked after beating the main game), you can trap the ghost in a ghost trap if you activate it at the right time. Run Fidel's path near the ghost trop in the center of the screen and then kill yourself on the spikes; then rewind and hit the button as the ghost is near the trap.

The ghost will remain disabled unless you beat the Speedrun Levels and release it again.

Cheats
To disable the ghost: Press SHIFT-CTRL-F3... if a thunder happens, go to the menu and restart. You can push it again to reset it. It's a cheat though!

Alternatively [untested], edit your save file at: (Mac) Users/username/Library/Application Support/fidel/Local Store/permanent.txt (Windows) [default windows save location?]\fidel\Local Store\permanent.txt and add "Ghost_Trapped" to the comma separated list of "unlocked:" attributes.