This is a very nice start! I love the effects and sound effects in this game -> Whatever you do, it feels like it's having an impact on the game and you always have something to entertain you, either moving very quickly with your character and watching that slick plasma tray or quickly hitting the ball on your side like a ninja -> It's just very fun to play around with this ^_^
Overall, great game, I'd just suggest a two-player mode and making it a bit more challenging. I've got to say, after I've looked at your site I've noticed that you have more games. It would be cool if you uploaded them on here, I'd definitely like to see more stuff from you, your style is neat :)