How deep into the game are you getting?
Code needs help, no argument, but there is still a lot to do.
For now..

Scoop--early--often.
Get your early, dull mysteries out of the way, like super ramp, super spinner, 2,000,000, super Gene Simmons list of chick conquests -- and the mysteries improve vastly. Fast scoring, Duece hurryup, Double Scoring (get this with Kiss Army multiball--and much changes).

Try to close out all 8 songs, as is. Very Hard--plenty challenging.

Go for the complete bonus board.
I believe the 2x bonus comes up automatically with your next mystery once you do this, but I'm not positive.
This is also plenty hard to accomplish, especially the instruments.