The tilting and floating is nice, fits the Underwater theme. The Shrimp is cute.
WASD should be in Camera or Modelspace I think tho, so when I look down, I can swim down with W.
There is no cooldown shown for the RMB Ability, and I thought it was cute when I was just blowing Bubbles, instead of a big Projectile. The ParticleEffects over all are pretty nice.
You can't float infinitely high, and it also takes up Stamina? Very odd for a 3D Underwater Game I think.
Also rescaling doesn't work very well, if I un-fullscreen via F11, I get a fullscreen Window that locks the Cursor when I try to resize. And the Health/Stamina Bar go offscreen either Way.
Made it into the big middle Crater, there isn't much else there I assume. Your Camera clips into the Terrain theire easily, which can block Vision of your Character at some Points. Your Map also is bad, but I'm assuming its a quickly thrown together Placeholder. While I praised the floatiness earlier, it can get a bit much when you've build some speed by swimming forward continously, at which Point it becomes too much. A hard maximum quite a bit lower then currently might work well.
No Idea how to get a Whirlwind going as in your Screenshot, I tried shooting, spinning, spaming Abilities, but maybe its not there or I'm too dumb.