conceptually good...
..but the thing NEVER stops bouncing! Just draw a small circle around it and watch the points fly, meaning that to get the highest score (even though there's no highscore table) all you have to do is leave the game open the longest.
If you can fix the eternal bounce bug, it would encourage players to get a lot more creative with their terrains, and a highscore table is almost necessary.
The idea is solid.