Despite what the title screen says, the game cannot be played using keyboard controls. Score submission does not work (or at least is not known to work) due to being unable to use the javascript:track_me(); command correctly. When the command shows itself, it says the score inside the brackets.

Secondary description:
How To Play

Aim and throw wet sponges at the children as they pass by before the minute is up. The more you hit the higher your score, earn extra points by hitting the 'Bonus' sign.

Mouse
Point and click.