How do you fill the cup? I can't get up onto the platform, and if I try to build up from below so it overflows into the cup the game always jams at some point where you stop being able to move.
Can you do the vomit jetpack trick in the cup level? If you've got that far then presumably you've managed it once to cross the large, spike-filled gap, and it should be possible throughout. However, there's an issue where vomiting downwards produces no upwards thrust on some devices and it's possible you may be running into that (even if it worked once previously).