The world is very two-dimensional -- it doesn't generate any caves or dungeons -- (the ruins are meant to be above-ground dungeons). The terrain will probably be too flat for most. You could adjust this a bit by tweaking the terrain noise, but it won't give the realistic shapes that more serious mapgens manage. City areas are completely flat -- only the wilderness has any shape at all. All the default biomes are reimplemented in lua, along with most of the stock decorations.
This is a work in progress.
Actual spoiler:
The source is available on github.
Code: GPL3, textures: CC-BY-SA and CC0
Mod dependencies: default, flowers, wool, bucket, beds, stairs, vessels
Download: https://github.com/duane-r/squaresville ... master.zip
Note for other developers: This mod does all of the mapgen work in lua, including planting decorations. This allows me to completely ignore chunk boundaries and problems with the C mapgens' decor spilling over into my work. The only random numbers used are for decorations -- all of the terrain and structures are completely repeatable.
Note for fans of the "complete" squaresville: You can still get the original can of worms on github. I no longer maintain it. I've published some of the missing pieces as separate mods.
Elixirs
Fun Tools (chainsaw, flare gun, rope ladders, wall hammer, etc.)
Hard Wood
Inspire (rewards similar to the metal/gem crafting requirements)
Wooden Bucket