Cartesian Coordinate Space Battle

GAME INFO
Cartesian Coordinate Space Battle online game to learn math. A game to review the Cartesian coordinate system, negative numbers and the numeric keypad. We advise you to use the keyboard to write the coordinates, because the game keyboard sometimes does not work. Use the hyphen to type a negative number. To fire, press the ENTER key, and fire at the co-ordinate point you have indicated. Kill all the ships invading your ship's space.