Big-Dig Adventure - 11: "Curse of Helium" (Patreon)

Curse of Helium was chosen, and we get to see the results. This curse will stay in effect unless you can find a way to remove it, so be careful!
With your newfound curse obtained, you still find yourself inside the Buster Waterworks, key to the Straight Balloon still in-hand. What are you going to do next?