Andres Baksai claims that his puzzle is the 'only puzzle with curved pieces'. Hmmmm. I doubt that claim is true. However, I can't name another packing puzzle app that does have curved pieces. In any event, I find his curved pieces puzzles to be more fun than the others.
I think these are good puzzles, but the 1010 levels is a turnoff. How can I possibly make a dent in that? This game would be much better if it had only 100 levels - then I probably would have done a lot more.
This reminds me of another puzzle app game that came in 2 versions. The free version had 1000 levels, while the premium had 10,000.