Hi, that's a good question, when hurrying last minutes to submit I didn't have time to wire this part up correctly. So there are only 15 capsules showing in total and you have 10 slots for retrieving them into the spire., so if you don't see more you can hit the exit button. If you retrieve 10 the exit button will glow, giving you the hint of what to do.
What I'd like to have done: maybe increase the total capsules that spawn, and also make the exit button glow once there are no more capsules to spawn.