Unfortunately, this isn't a game at all. It's a utility of sorts that lets you insert your face into a number of different old-timey pictures, "cloning" yourself in wacky ways. You can see an example of how it works above -- you snap a picture on one face, and then you can fix or adjust the other faces as needed. Unfortunately, it's all just for one face, so you can't snap a few different faces and insert them into the photos as needed. That seems like it would have been a fun option, and added a little more functionality to the app.
When you're done, you can share your photos off to Facebook, Twitter, Instagram or the other standard services you see above. Clone Booth is simple and it's only US$0.99. If the photo above makes you giggle and the prospect of making your own seems like it's worth a buck, go nuts. The rest of us will probably wait and see what Jackbox is working on next.