I like that you get to glue new components onto your mech wherever you would like, I think this is a very fun idea.
The contrast in alien presence from the first level to the second is a bit jarring haha! Also, after completing the second level, I got like 90000 dollars so I could just get whatever I wanted.
I would recommend polishing the gameplay, mainly the alien spawning and objectives, and there could be something pretty cool here!
Nice work!