i don't think the gray/green alien design is plausible either (how are you not cold you're like 1 meter, have 0 fat) but large eyes aren't necessary impossible, they could have evolved in areas where light is present but very dim or they could be compound eyes.
but yes the alienito design is very silly. i especially like how they seem to never have clothes of any kind, like not even a space suit. my duendes just rawdog 200 million light years of space radiation with no problem
ARUUUUUU BROTHER