jigsaws. Cool game, just some things to consider:
- the place where you place the pieces should be black, not with a clue of the image (there is another clue of the image in the right of the screen, why to put two of them), otherwise not only the easier difficulties get free, but also is hard to see if in a certain place you already put a piece or not, if you're at the end of slove the puzzle, etc
- Can't you make more images to solve? like, getting images of lots of things and putting them in the game, and maybe even adding some text of what the image is and/or what it represents
but still, pretty cool game!