Anyone remember Alexey Pajitnov's awesome puzzler, Pandora's box? (please don't tell me that even the author's name doesn't ring a bell! Pretty please? :))
Well, one of the subgames of Pandora's box was a picture puzzle, but not an ordinary one. The screen was split in uneven pieces, so depending on where you put the puzzle piece, it would grow and shrink to fit the rectangle's size. Well, this game is close to the spirit of that subgame, except you have to resize the pieces at will. It's not very hard once you get the hang of it, so go try it out!