I'd figured out that the rainbow powerball boosts one letter to the top, but I was trying to learn whether it can be moved in order to store up for a second powerball. I found that the powerballs that haven't rainbowed yet, the ones that are solid red, or blue, or whatever, have different behaviours, very odd an difficult to understand. Is there a guide to what they're supposed to do, and is it random, or does it depend on colour? Also, can one accumulate two or three powerballs? How is that done?