This is a two-player game. Player 1 uses the keyboard; player 2 uses the mouse.
Player 1's board is on the left; Player 2's is on the right.

When a square turns red, you want to hit it:

***Key controls***
Type the key (0 - 9) on the keyboard's number pad that corresponds to the red space on the left board.
For instance, if the top left square is red, press 7 on the keyboard's number pad,
if the bottom rectangle is red, press 0, ... etc.

***Mouse controls***
Point and click on the red space on the right board.

NOTE: You lose a point each time you hit the wrong square.

Versus