press space to insert coin. use arrows to move your torpedo gun press space to shoot.
I once went to a Indoors summer camp. On the ground floor there were 2 unplugged arcade machines: Hammer and Battleship. Hammer was broken so they decided to shut off both of arcades. We found out how to turn on battleship, but no tokens were sold. I said to my new roommate, that I knew some programming, and I can make this game on my notebook. And then this game was coded.
