Idea: During ball 1, you can go Back to the Future, and get a glimpse of what bonuses, modes, pitfalls, etc will be available in ball 2 and 3. You can then continue playing ball 1 with the goal of setting up for (or preventing) those future events in ball 3. Likewise, in ball 3, you can go back in time to complete goals that you missed that are only a part of ball 1. Basically, traveling back/forth between balls to simulate time travel and its advantages. Could get confusing if not done well though!