This is the creature from Alien, not Aliens. In Aliens they were more animal-like in the way they moved (sometimes on all fours, but much of the time not), but in Alien it was upright a good portion of the time you saw it and intended to be more of a humanoid than an animal.
Maybe, but I don't recall seeing it upright like this at all even in Alien. It was mostly shadowed throughout the movie, without seeing a full picture of it. They're supposed to be the same aliens (right?), so I would chalk up any humanoid visuals in Alien to lower production budget versus canon on how these things would really look.
Anyway, I didn't want to bag on a cool toy - just not really a fan of the pose, but it is very detailed and cool looking outside of that!