The Jetpack is a rare to very rare item that is immensely helpful in traversing the dungeon. It can be found inside certain shops for $40,000 or as a very rare drop from a crate. As of version 0.99, it cannot be equipped at the same time as a cape.
Functionality
For all intents and purposes, the Jetpack replaces the rope, spring shoes, and climbing gloves. It allows you to fly upwards in any direction by pressing and holding the jump button after jumping. The extra boost works for a short time, and recharges when you touch the ground. It has infinite usage.