This is a old-style Spacewar remake.
Spacewar is a game where you pilot one of two ships or challenge the computer in a battle to the death. The screen size can even be changed to allow for any number of possible scenarios. Controls are simple: Player 1: a,d,w,s, Player 2: Arrow keys. + and - change the game speed (to adjust for computer speed). Price is free. It is optimized for 2 player play, but Beta 1 player game is included.