Is good the GBC rebound, but I'm going to talk a couple of ideas to make it more interesting:
1. At the goal of each level (very Super Mario Bros. 3 style), the screen freezes until you get to the next one.
I considered that you would put a goal screen that gives more extra coins when it takes less time to overcome the levels.
2. And speaking of coins, as with the two parts of Rebound 2, are only to be collected and that's it. And it is from this version is where it should already give its most basic purpose. How to invest them in stores to get temporary power-ups.