Dunno anything about the Garbage Pail Kids, but hey, this is a pretty cool art collab!
I'd love it if it got a bit more creative in its presentation than just a standard gallery, but even with that being the case, it's a good looking gallery with some nice touches like being able to see the original artwork its based off of right there by its side. There could be some more features like being able to zoom in/out, a thumbnail gallery, and so on, but again, it's fine stuff.
While it is decent, it does have some issues:
*For one, the buttons are really awkward in that their hit area is the letters themselves instead of a bounding box: classic Flash mistake when creating buttons that makes it really awkward to click!
*While you do provide not only artist credits, but easy links to the artist profile by clicking on their name, which I like very much, the links unfortunately open within the game itself instead of opening a new browser window/tab, which makes it so that you pretty much have to reset the game to continue your journey through the gallery.
*The navigation could use a bit of tidying up. For example, it's a bit awkward in how, when you go to the bonus gallery and then come back, it doesn't save where you were previously and instead sends you all the way back to the start.