Nice Flash skills, bad game :(
I'm a bit beside myself here. I actually bemoan the fact that you made this really slick interface, these smooth animations, AND a level builder, and then you went and chose such a monumentally boring premise for your game.
I'm not trying to be mean-spirited, but let's be honest: it's a generic cannon shooting generic pies at generic targets, using generic Worms/Tank Wars ballistics. It's a veritable smorgasbord of unoriginality, and the gameplay gets old real quick.
I hold out hope that you'll take your obviously wicked coding skills and make your next game much, much more interesting than this. Best of luck.