Use W, Space, or the mouse to jump while in the Cube gamemode or switch gravity while in the Ball gamemode. This also activates Orbs that you are intersecting. Hold up with the ship or hold diagonally up with the wave. GG everyone!
Credit to: SquidFan0 (https://scratch.mit.edu/users/SquidFan0/) for giving me the portal, ball, and orb assets and helped me with coding. (In other words, he taught me how to do this.) Geometry Dash creator FunnyGame (using the account Caustic) for creating Death Moon, which inspired the final wave gameplay.