The small size of LEGO minifigs precludes complex designs for alien life forms. Otherwise they quickly get too large and unwieldy. This particular alien is a VERY simple design – two pieces: legs and a sloped piece. The more discriminating reader will ask, where are its arms? My response: it doesn’t have any. Then how does it eat? they will ask. They don’t; they live for a few days then die of starvation.
I didn’t say they were masterpieces of evolution.
