In the picture I used to make this one, these guys didn't look so sinister. They do now! :)
About this creation
Here's my favorite two aliens [after Marvin, of course!]. This mosaic is 160x144 in side although I ran out of baseplates so you'll notice one missing in the upper right. It's 100% blue tile so I figured I'd skip it for now. In posting this pic, I just noticed a problem with the top of Kang's helmet - I'll have to check that out. Looks wrong.
Anyway, they look pretty tough here and when they're about 4' tall lying on your floor they look tougher!