It was good
It wasn't one of my favorite games, at least not one of my favorites from ArmorGames, but it was still nice. I admit that fighting in an elevator and defending it from little blobs was a pretty original idea, not to mention it was cool to see those guns automatically shoot them.
I will say there is one complaint, and that is that I don't see how it's even possible to defend three floors at one time. I would've preferred that if one floor was destroyed, it wouldn't affect the others, but whatever.