Thanks for the review! The swimming element is a bit different for this game. If you're doing the "Dolphin Dive" move by holding shift, don't hold any other keys besides to steer left, right, up and down with the arrow keys. If you start at a neutral state and hold shift and nothing else, you'll just start going forward not thrust upward. I know when I first started using those controls I kept pressing up to go forward while dolphin diving so I just kept hitting the floor until I realized what I was doing. We should probably find a way to describe the swimming mechanics better somewhere early in game lol