I have always loved playing pinball. I remember when Star Wars, Episode One came out, there was a pinball machine at our theater that had a holographic image in the back of the machine that was interactive based upon ball movement, and would show cut scenes.
I also remember as a child playing Pinball Quest on the NES. For me, the thing that made this game memorable was that it had different levels, and play progressed. It was more and more difficult to pass through each level.
If I were to design my ultimate pinball game, it would definitely have different levels. As you accumulate points, you could purchase or earn upgrades, such as bumpers that prevent your ball from leaving the table. There would be challenges, such as barricades you have to destroy by bumping into them over and over, enemy objects that shoot at your flippers and ball, vortexes that suck your ball in, bosses you have to destroy, dead ends, and wormholes that jump you from level to level. Eek this sounds like such a fun game to me!
I also would like to eventually turn it into a multiplayer game, where each player sits at their own computer, and the table is designed with two ends, kind of like an air hockey table. The physics could get...interesting, but the players could hit targets that destroy their opponent's flippers, and other targets that boost their own flipper defense. What do you think? Would you like to play a round or two of battle pinball against your gamer buddies?