This subgame has been discontinued.
In its place, I have created dreambuilder_modpack, which, as the name suggests, installs like any other modpack. Pretty much all of the standard Dreambuilder content and features are still there, exactly as you all know it from the subgame. There may be a feature here or there that didn't get carried over, and where that's the case, I will endeavor to fix those things.
Since this is now a standard-form modpack, it depends on the upstream minetest_game distribution.
Please delete any copies of the old dreambuilder_game that you have floating around (or move them out of Minetest's reach anyway), you will not be using it anymore, and its old thumbnail (the brick house) will not appear in the main menu anymore.
To install, just copy the new modpack into your mods directory and enable it like any other modpack. Since this new modpack carries all of the mods that the subgame had, make sure you aren't trying to run any separate mods alongside it that are also included in the modpack.
For worlds that used the Dreambuilder subgame, open that world's "world.mt" file in a text editor, find the "gameid" line, and change it to "minetest" (all lowercase).
Furthermore, this modpack no longer uses git submodules like the subgame did, because they're evil.
Now the big question: Why did I make these changes? The short answer is that maintaining it as a subgame is too time-consuming, error-prone, and tiring. There are too many good things happening with minetest_game these days for me to keep up with, as far as pushing updates into the subgame's base code. A modpack is far easier, and still carries the majority of the features people surely want.
The URL for this modpack is now:
https://github.com/VanessaE/dreambuilder_modpackThis thread will continue to be used for modpack updates, discussion, etc., after being relocated to a more appropriate forum section.
Finally, in the process of this transition, I have updated a bunch of mods: castle, homedecor, bedrock, biome_lib, coloredwood, currency, display_blocks, gloopblocks, ilights, maptools, moreores, moreblocks, moretrees, nixie_tubes, pipeworks, prefab, quartz, signs_lib, spawn, technic, unifieddyes, vines, and worldedit.
Most of these are just changes in upstream URLs, mod.conf, screenshots (which I really should delete from the modpack), and similar updates; technic contains the most important stuff, with some smaller stuff in homedecor.