Represent progress more visually?
Have you thought about creating a way for SB users to "build" something visible as they progress? The power ups, bad guys, and quests could all be building elements (bricks for instance) with colors corresponding to the challenges they're working on. Could make it infinitely expandable...pyramids could work. Your first pyramid would be super quick to achieve (6 bricks), but each successive one would have one more brick in the base (10 bricks for next, 15 for next). Just an idea. Loving SB. Thanks you!
Golden Goddess commented
This is a great Idea! I need visual stimulation as well.
I think a concrete reward system is the only thing that could be missing from this program.