I got that part but the throtlte doesn't work well on the Rift controls. I forgot what the issue was but it's almost impossible to control. You have to very gently press the trigger (or grab?) because if you press too much it activates some kind of object menu.
The Drone is controlled by tilting your whole hand. I too had issues withe balloon, they'd never release no matter what button I pushed (or didn't push). Not a big deal though.