You could have all the normal example projects AND separate tab for achievements and trophies. They could have different ratings on how hard they are, and it could challenge older scratchers to get platinum on all trophies. Would it work if you complete them in the wrong order? I don't think so because that could mean less work and less challenge. There would also be more than 2 trophies, it was just an example.
And a way to change the purple bar to blue. Just sayin!