It looks unfinished. I don't know if the game is buggy or not, but seems like I can place "Fish" inside of a wall and in the air? And other than that, still not sure how to make progress.
This is really neat, but uncontrolled characters wandering around need to stay on their platforms. Too often they'll move to adjacent elevators, which is at best a huge waste of time, and at worst can cause them to fall onto spikes if the elevator moves away before they reach it.
Other than that, very well done for an LD 72h jam!
Figured out the mechanics, finally... love the art and music, but as ultimatum479 points out, the characters wander around, often fouling progress. Still, amazing you did this in just 72 hours!