I have a few random ideas.
* There should be a target that qualifies a letter. I suggest the two upper targets in the bumper area. It's very frustrating trying to "aim" for an inlane. It could also be the center stand-up in the 1-5 bank.
* Spinners need more scoring. The right bank is super hard on mine to knock down to progress the value. There should be a "something" that qualifies a flashing inlane, when the inlane is flashing, it will light the corresponding spinner max value for a few seconds. This of course needs to be balanced with the right bank etc. I'm thinking dropping the bank adds a multiplier or something. Bottom line, get those spinners valuable!
* We should figure out how to have more fun with the lock traversal. Having either "blast" or "off" should qualify a 2-ball multiball or something.
* 3x and 2x scoring for the the amount of balls in play during multiball?
* Bonus built beyond 9k? Flashing bonus means double bonus?
I'll be back with more ideas...