Nice job! I am very experienced with the "art" of map-making, so I can give you a few tips:
#1: Do you bug test? For example, I test my maps to see if the work, and I did notice a few bugs:

• Certain areas after going down you could not get back up to.
  
• There was no water in the dispenser that was supposed to create a way down
  
• Consider installing a mod like tmi, (too many items) because you had it on cheats. If you can't install tmi, create a world without cheats, and open it to LAN with "Allow cheats" set to "on". That will give you access to cheats without creating a world with them (plus as soon as you close the LAN, the ability to use cheats becomes "off" again.)
  
• If you ever need me to test a map, just Pm it to me and I'll be happy to take a look!
  

#2: Programs. I believe you have world edit (lucky...) which is a great map making tool, but in order to make a map just how you'd like it, I suggest world painter. For example, land of the undead was created with world painter. It takes some getting used to, but you can also add a border (even a void) To prevent people from escaping your "area".
#3: Keep up the good work!

Now that I have some time off, I'm going to lay back, and play some TKS1 adventure maps. ;)

I Love It!