I love the vibe of, like, bootleg snes porn games, or old Japanese pc-98 stuff. The ability to move the picture around under the pieces is a clever idea, although it kind of leads to some degenerate strategies. It's necessary though, since many of the pictures have generous margins that make indistinguishable solid-color pieces. Making images for a traditional jigsaw puzzle requires making sure there isn't much empty space in the image.
Cute art and I love the idea of getting community artists to provide images for puzzles (I congratulate the artist who did Viruses For You as a fellow Dr. M***o fan). The collaborative aspect reminds me of the java/flash breakout/qix clones that were popular with Japanese artists in the 00s.