Very fun, well made and entertaining! It's an allegory for something I didn't quite catch until I read some reviews.

The fish sounds and speeches are really funny, if not a bit sad. The parasite that sings a song is so nonsense and HILARIOUS!!

The fish you meet have their own opinions on whether you should choose to go up or down, when in reality nobody knows for sure). Some of them went literally crazy with their obsession of wich way to go. A fish trapped in some plastic calls it its 'throne'. Some of the fish are still undecided about which way to go, so you can influence their choice (or manipulate them, telling them the one you think it's wrong). When you get to the end, the final choice is up to you.

The wise fish at the end tells you that the choice in itself doesn't really matter, but what matters is the gift of having the choice and how you use it to manipulate others or not.

When you make the final choice, there's also a monologue that talks about how thinking your pain is greater than others is wrong. Everyone is going through the same thing, you're not alone.