Needs better "control" over our little employees. You know,something like assigning them to particular floor, or something like planned route for them. Otherwise good game :)
PS
You have to upgrade elevator system somewhat. No idea how, but it's quite innefective. Maybe add staircase?
The game's too easy: enemies are so easy,that you can skip most of weapons. Also, I lost 3 lives only once, on the second boss,so as you can see health upgrade isn't a must. No real challenge for former NES gamer like me!