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Hostile aircraft seem rather afraid of this weapon lol, they always fly away from my experience. Would it be possible to change what button spawns the anti-aircraft weapon?

A few NPCs chilling at the top of the building would be very nice as well.

Very cool add-on to the map! I made an account just so I could leave this comment. A few things that would make it even better is if it had a couple of stores at the top (ammunation, clothes store, etc) a couple elevators to teleport you to the parkling lot and the top, and slightly angle the steep slide so you don't risk falling off the building.