I like lighting up the EMBRYON letters because they are 5k each. Doing the whole cycle twice lights the lower special lights. It's too bad multiball isn't much of a mode but it's fun. I like to get the top left extra ball light flashing and leaving it for when I need it. The lower left drops are so hard to get and the reward is small. The wheel is the most important part of the game. The saucer at the top is 10k and the rollovers near it when lit are 1k each.

Are there any resources for disassembling the code? It would interesting to take a peak.