This is extremely well done. It is remarkably polished and fits the theme splendidly. Very clever concept, too.
My only ideas for improvement would be a bit better onboarding. Before I knew what I was supposed to do, I didn't really pay that close attention to what objects were in my room. Mostly my fault, because I should've known, but you could alleviate that with more hints/stronger tutorial before level 1. You're on the right track with having "objectives." I think putting objectives in there that would subtly hint at what belongs in the room would be cool.
I also would've appreciated some kind of explanation for why my "HP" went down when I guessed wrong. Maybe change "HP" to "time remaining," and act as if inspecting an object takes time. That would give the aliens time to catch you.
Those are minor nitpicks, though, and I think this is a fantastic achievement. Very well done. Congratulations.