My impressions:
- Very floaty control, but it works because you're underwater. I like that you're intentionally going really floaty with it.
- Booster is fun, but feels a bit unwieldy. In general, I think the top speed of the character is too high. Have a bit of a whiplash effect where I'm zipping all around and losing control. If the top speed was lower, and the "pickup" on the booster was slower, I'd feel much more in control.
- W to "jump" feels basically useless, I can't get up any ledges with it. I have to boost everywhere. If that's the case, might as well just lean into that.
- I like the different weapons, feels good. Fighting enemies doesn't feel as good, because of the speed I'm whipping around at. It makes it hard to feel like I'm in control and aim my shots.
I think if you tamp down on the movement, you'll have a nice platformer here. I didn't even get into the PvP aspect, so sorry I don't have feedback on that or the deeper parts of the game.