WASD / stick
Move. You go where the camera points.
Mouse / drag
Look around. Click the view to capture the mouse, Esc to free it.
Shift
Sprint. Sprint up through the surface to leap out like a porpoise.
Space
Jump on land, leap out of the water (onto the docks), swim up underwater.
C
Dive. Or just point the camera down and swim.
Click / F
Bite. Bite tourists, other sea lions, or grab a beach ball or fish and bite again to throw.
E Q
Bark and wave.
1-4
Tricks: clap, balance a ball, roll over, backflip. Tourists who see a trick give you points.
R
Lounge in the sun, the main thing sea lions do.