It's a fun little jam game, and works really well with the theme. The main mechanic is really important for the game and thus the theme is really well used.
There are some issues (as always with jam games). The tutorial lied to me, W doesn't work. Getting stunlocked by crabs is not fun and feels a bit too punishing. Some things are hard to understand (do I also collect trash when moving through it or only when breathing, what is collectable and what is not)
But it's a good game. Good job!
(But I do feel like you have way too many teammates in your team)