The game with its art is pretty good, but there are at least 2 things that have ruined my experience.
1st is that the pictures are not side to side. To see the entire game I had to zoom out, but then I couldn't see the details and had to zoom in again and keep scrolling up and down. Perhaps if the pictures were beside each other, that could be a bit better.
The 2nd thing is that the missing details were sometimes very hard to notice... Or perhaps it's just my eagle eye being lazy. At some point I got very annoyed and started clicking all over the picture to find that 1 missing detail.
Maybe, as it was mentioned earlier, add a possibility to browse through all the pictures to, at least, allow player to have a look at all the art you've created.
Overall I think the game is pretty good! :)
Also a plus for the music. Shame that it's only 1 track, but I think it adds a bit to that "strange-world feeling".