I felt with SD2 I had a really neat formula that could be repeated. So I set out to make another set of caves with a similar feel with the easy action, fun puzzles and similar colours.
So far it's really shaping up well, I have about 15 caves and they're fun
I also have finished a game made with my own graphics set. It's not as fun, but it's interesting, and I can't release it yet because I made a mistake in one of the caves