Maybe someday I'd come up with my own physics based puzzle game. Little by little though as you don't want to hurry. It seems much more complicated but I'd like to learn as much on box2d. Here is a really nice physics based game. You shoot through blocks and make a number of blocks fall off at each level. Sounds easy? Try it on.
Blosics 2 walkthrough
Blosics 2 Challenges walkthrough - Levels 1 - 15
Blosics 2 Challenges walkthrough - Levels 16 - 30