AlwaysJetpack

Adds two options to Options > General:

• Always Allow Jetpack – lets you use the jetpack in every area, including gravity zones. Jump for the double jump, then press again to start the jetpack as usual.
• Jetpack Hold Time (seconds) – how long you hold sprint in the air before the jetpack starts. The game default is 0.25 s; the slider goes from 0.05 s up. Leave it alone to keep the default.

Settings are stored in UserData/MelonPreferences.cfg under [AlwaysJetpack] (AlwaysAllowJetpack, JetpackHoldSeconds; -1 = game default). Client-side only. Requires MelonLoader.