Batman save underwater

One unusual Batman game which takes place under water. In Batman save underwater you are hero in a submarine vehicle and you move under water. You must make sure you do not hit the bottom or the top of the screen because there are sharp rocks which will sink you for sure and the game is over for you. You use arrow keys to navigate trough the underwater caves and use your mouse to shoot the incoming enemies. Those are various fish and all kinds of sea creatures. When you see floating suns pick them up because they are points. Good luck and see how far you can get!