If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
This is the classic strategy game of Connect Four. In this game you and the computer take turns to put down coloured pegs, once the peg of a colour forms a line of 4, the game is won. The smaller the number of pegs used when the computer is beaten, the higher the score.
This game is played by mouse only.