Hey, thanks for trying it out! I agree with what you're saying about it not being clear that the mech cant enter the zones but the pilot can. I wanted to add some voice lines tell the player that, but ran out of time.
I do agree that it is very easy to destroy the generators. In the future, if I pick this up again, I would probably add smaller batteries around the generators to destroy before destroying the big one, or something along the lines of that.