Its Pong, no new concepts there. Score points when you create particle explosions. The more particles onscreen the more points. Bat the computer to get more particles per explosion, lose and you lose particles. Get down to 0 particles and its game over. The computer is pretty useless to start with, but gets better fast.... watch out for the warp fields too.
I'm not sure why they havent accepted the version with a workign score link.
But the scores are viewable at http://www.blastone.com/g ames/pong/showscores.php