For some reason I can't get my elevators to go to the 3rd floor, so I always have a bunch of stranded people... even when I put the shaft between the 3rd and 4th floors, the elevator simply goes down, out of the shaft, and connects floors 1 and 2. It's kind of stopping my expansion :/
Spent way too many hours getting the gold star time in the fifth level, mortar is useless and all weapons are useless except rocket launcher...
I liked the game at first, but was disappointed when I found out that almost every weapon is useless except the very first one you unlock. (well, the flame thrower is not so bad, but I prefer long range weapons)
 "Epic Creature Hunter I"){kind=icon}
 "Corporation Inc."){kind=icon}
 "Bloody Fun Day"){kind=icon}
 "Mechanical Commando"){kind=icon}