Swim and box crabs

2) I love that the screen saturates with color when you go underwater, but it's weird seeing that happen even when you're on the surface.
If you'd like to make that effect happen only underwater, there's a pretty simple trick involving a Trigger Zone : )

I love it so far! Great character, great animations, and some really nice logic. I have 2 thoughts for now.
1) Using to rise in the water feels a bit odd. Most games I can think of use the jump button, in this case , to rise.