Not terribly challenging but a lot of fun. At least until the elevators bugged out on me and all my workers got trapped on the top floor.
A few suggestions. Being able to select employees from their desks rather than selecting the employee themselves would save on time and frustration. Also think about moving the elevators to a background layer viewable only from their build menu. I like them as a play feature but having the big elevator shafts taking up 25% of the total office space is really distracting and makes the overall experience less enjoyable..
So the #1 entry in the Driving CREATIVITY (emphasis intended) contest was a remake of an old Atari game?
Sure it's a fun game and all but I think the spirit of the design contest has been missed.
 "Corporation Inc."){kind=icon}
 "River Raid"){kind=icon}