Likely the reason there's no guides is because most people don't think of Pinball as the kind of thing where you have to be stringent about the challenges and doing things. I know when I play, I'm happy as long as lights flash, and I only do missions if its for an unlockable like on the Pinball Hall of Fame collections.

If this game has an option or a viewpoint that gives you a closer look at the board and lets you scroll over it while paused, I'd use that to examine it. You're likely just going to have to experiment to find out what you're supposed to do. In most pinball machines I play I never have the slightest idea how anything is supposed to be done.... Balls of Steel has this one fantasy-themed board whose missions I can never figure out...