Nothing complicated going on here… take the old favourite, Pong, rotate the playing field and add loads of fuzzy glowing effects, a thumping soundtrack, some breakoutesque pickups and lots of balls.
If you drop a ball you lose points and take a step towards losing the game. If you get ’em past the computer-controlled paddle you win points and get to play for longer.
It’s simple and fun and only marred by the eternal problem with Flash games: if, in your excitement, you mouse off the playing area you lose control and generally lose the game.
Play Pwong here: http://www.jgames.ch/jgames/play.php?id=204