Thanks, I'm glad that you like them. It's impossible to combine them because of several hard limits that can't be worked around. Each map has one or several of those limits maxed out on their own, too. For example, if I wanted to expand any map in any horizontal direction by even a little, the map compiler program would instantly say no.

The closest you can get to connecting all maps into one is to make use of Lua coding for the maps' tunnels if you have the expertise. So by going inside a tunnel, the maps would change and spawn you near a specific tunnel entrance in the next map.