The controls are smooth, and it's weirdly cool how you can stretch the camera to take up the full map like that. The game itself however is pretty empty, all you do is spear fish in order to throw more spears to spear more fish, there's nothing keeping track of your score, and no way to lose. It needs those things (and more) to feel more like a game and less like a barebones test.
(There's also a glitch where the fish just hug the wall, unless it's not a glitch and the fish are just cowering in fear from the bloodthirsty Fin?)