Pretty polished game, well done! I found the controls tough though! On my first play I ran into the wall right at the beginning, spun out, and couldn't get up pretty much, haha. Second play was better where I made it to the rest of the world, and eventually ran out of oxygen.
It's probably realistic, but just a little less float-y and spin-y might help players get further. :)
Menus and UI are, yeh, polished as well. It's impressive.