I'm glad you got all the zipping and posting stuff figured out. I played through both maps for a minute or so, and thought up a few points of improvement:

1. Avoid dead ends like the tunnel in Tower. The map should flow, not require you to turn around when you hit a wall.

2. Avoid paper thin walls like the one in Upstairs

3. Learn to merge your individual maps into map packs, to make playing them easier. You should also name your levels in your level editor.

4. Upstairs could use some more cover. Aside from the paperthin wall, you are a little exposed. This is nice for some parts of the map, but even Thunderdome and Route 66 have quiet areas.

5. People will be more interested in your maps if your add screenshots.

I hope this review is helpful. Keep mapping and working on your technique.