The trick to the jetpack is to jump and then boost, it gives you a much bigger boost allowing for jumps to be easier. there are a lot of quirky things like this for players to find in order for speed runs to be continuously beaten.
Yeah, the jetpack was a bit buggy to make and we tried to balance it with a “Rage game” in mind so as to not make getting to the top super hard but still possible :)
Seems like a nice prototype, add some gun sounds, make it so the player can't move the camera when in the pause menu, and add a quit button to the main menu to close the application.