Apologies for any crashes. We're aware of some memory issues on the real hardware in the higher levels. We're actively working on a future update that we hope will address these issues.
Concerning the orbs quest, if you find yourself with more orbs than available spots, fret not. "The smuggler," a character you might encounter in the sewers, can assist you...
She'll collect any extra orbs, transporting them back to town for you.
This way, you can lighten your inventory load and continue your quest smoothly. 😉