Quoted from Pinball-NJA:
What’s the best way to get a high score in this game?
I know about attacking the castle for most points, but is there a way to get the multipliers up high or any other strategy toward getting a GC?
Castle Hurry-Ups can add a lot of M's to your score as well. Here is a description. Be sure to get take advantage of Hurry-up multipliers...
The rule about Castle Hurry-Ups is somewhat confusing. If you've just completed Damsel Save, Catapult Slam, Peasant Revolt, Joust Victory, or Trolls! (in single-ball play), and this completion lights the corresponding Madness for Multiball Madness (i.e., sets the light to flashing), then this completion will NOT light or extend a Castle Hurry-Up. Otherwise, it will. In other words:
If you haven't played Multiball Madness yet, you won't get a Castle Hurry- Up unless you repeat something you've already completed.
If you have played Multiball Madness (but not yet Royal Madness), you get a Castle Hurry-Up every time.
Trolls! won't give you a Castle Hurry-Up during Multiball Madness.
You may also start Castle Hurry-Up via a Super Skill Shot or Merlin's Magic award.
The Castle Hurry-Up value starts at 1M and decreases rather quickly, to a minimum of 250K. Collect the Hurry-Up at the Main Entrance, regardless of the state of the current Castle.
If you complete another row of lights which would normally start a Castle Hurry-Up while one is running, the Hurry-Up resets to a higher value. The second completion adds 2M to the Hurry-Up value, then each successive completion adds 500K more than the last. So the Hurry-Up is worth 3M with two, 5.5M with 3, 8.5M with 4, 12M with 5, et cetera. If there is a limit, it is at least 25 million. The Hurry-Up counts down at the same speed, so there is no need to worry about it timing out if you have at least a double going.
Each Hurry-Up collected is counted (so a 3M Hurry-Up counts as two), and (default) 10 Hurry-Ups lights Extra Ball at Merlin's Saucer. A second EB is available at (yeesh) 40 Hurry-Ups.
Here is a good web page for rules...