Did not expect a 3d game, really nice!
I really like the idea of floating around and exploring the caves to find trash!
The controls could use a bit more work, it felt like the swim boost and the falling were a little too slow, and the wasd movement could be a little snappier at the start (but still take a second to stop moving)
Also, just a small bug, but if you keep swiming when you hit the top of the level, it takes a while till you start descending (probably need to just set the velocity to zero)
Still, this was a really nice jam entry, nice work!