Quoted from sturner:
It's a double-edged sword for the pinball industry. If they make the games real easy to figure out, it bores pinheads. If they make them too complex, casual players won't understand them. At this point where games are going more and more in homes, I can't see them building them for casual players anymore.
The best games manage to have multiple levels. For example, MM. Anyone can walk up to MM and see the big giant castle in the middle, and see when they hit it the drawbridge goes down, that makes them want to see what happens when they cross the bridge, and then when they see the gate open, what happens when they shoot the ball in there, then they get to see the castle blow up and see a big giant "2,000,000" on their screen. This makes it obvious to anyone that the castle is an important shot.
Then the more hardcore players will start digging in, and figure out about Madness lights, Castle Hurryups, Royal Madness, and then start lighting those blue lights in the middle.
Then the really hardcore realize thet they get a lot more points if the can stack up multiple hurryups before shooting the middle, that they get a better Multiball Madness the more lights they have going when they shoot Merlin, etc.
Goals on multiple levels. That's the key.