Interesting idea, pretty good execution.
I liked the game, though I had a couple of gripes. First, it isn't really 'pinball', is it? I was expecting pinball, so I was kind of disappointed on that score. Second, it was pretty difficult. I had to retry levels 18 or 19 (forget exactly which) about a dozen times...I gave up at level 20 'cause I just didn't want to fool with it any more. I imagine if someone just wants to play a quick game for a few minutes, they're not going to see most of the content...
By the way, if you're having problems with the right-click menu...The way I would do it is to put after every level a blank frame that has script saying "gotoAndPlay(1)" or wherever you want to point it. And when someone solves a level, you just have them jump forward two frames instead of one. So if they solve the level like they're supposed to, they go to the next one, but if they try to right click-Play to bypass it, they go to the 'stopper' frame that sends them back to the beginning. (Or you could send them to a frame that says "Stop cheating!", or, you know, whatever you want. ;) )