Nice job - I can tell a lot of time and thought was put into every aspect of the game. The art works well with the design, and the music creates a great vibe.
It is quite hard, and I initially got stuck early on (level 3 I think?), I think because it just seemed kind of twitchy and difficult. I came back for another try and got better at dodging the aliens and switching quickly to the AI to close doors, and was able to progress.
There's an inherent tension between the platforming (alien-dodging) aspects and the puzzle-like aspects. Something I realize I can proceed in a very "safe" puzzle-like way (lure alien here, get thing here, let alien return back to his home area, etc..), and other times I feel like "I need to do this platforming section perfectly or I die and restart the level". But this is a balance that's really hard to get right and I think it's done pretty well.
Anyway, great job - I'm impressed by the polish, the amount of content, and the thoughtful design.