This package leaves me with conflicted view. To start off with, looking at the positives it is a interesting game concept, something different not seen/really done with the minetest engine. the concept of what the game could be is really interesting. onto the cons, from a playability standpoint it simply is just placing some elements and increasing a counter, and after a while it gets boring. additionally you are limited to placing things branching off of existing areas rather than placing things anywhere on the map. in spite of this i think that the game could be a great thing if some of the wanted contributions for features e implemented and could potentionally give the game a point. on the topic of contributions wanted it seems the author wants to keep going with there very odd dreampt up license https://github.com/Splizard/buildacity/blob/d2b30f7aa203c163a6015947bddfb9148a249069/License.txt of which there is a osi thread asking it to be approved https://lists.opensource.org/pipermail/license-review_lists.opensource.org/2021-February/005068.html which appears to lead nowhere as well as potentially suggesting that git hosting sites forks might not be allowed (not a lawyer disclaimer here). regardless contributing to this code base while something that would be fun to do, seems like something that is probably best to be avoided.
I'd like to clarify that the Open Source Initiative thread mentioned here is for an earlier draft of the license, the license has been substantially changed since then with the goal of addressing the concerns raised on the Open Source Initiative mailing list. One of the intended changes has been to ensure git forks and contributions are allowed by default.