Yeah, this is gonna be a PvP game at the end of the day
Oooh, ok. That makes a lot of sense why the gameplay is in that state.
If I had to replace swimming up with something it would be a mix of jump and hover that would allow for vertical strafing around enemy.
Try spawning more enemies
I already did but twice is not enough.
I wanted to make it feel like you were controlling a ship/submarine in water
I can see that. While playing I thought that it would fit better if reskinned as large ships or planes combat. Shrimp is not a great match for this kind of movement.