I think you were trying to replicate GTA in minetest. But I say your game is too WIP for GTA. There is nothing to do in GTB plus only riding cubes is boring. Your buildings are one node, but to improve them you can make them many node to atleast make it like GTA and, you could add NPC's to the game and use skybox.
If you do agree to add NPC
Then you could make them talk to the player, Trade with the player, shoot the player or other npc's, and lastly add them riding vehicles.
I will change my review after you add some goals and improvements in your game
Ok i really want to say if it was a joke it was good and I really want you and the owner of this package to turn this into a game. As minetest has over 50 games of which some are remakes of the orignal game you can actually turn this into a minetest version of GTA. And I would really appreciate it. And I will truly give you and the owner a hand of support as it is a good start
Theres a few things engine side i want to get working before we make that kind of game, specifically
new client side physics functionality (for vehicles), and the ability to generate Lua based mapgen in parallel.
Once those are in, I see no reason why we cant make at least a drive and cops pursuit part of GTA. as for NPCs and stuff that would be a larger project than i would devote the time to.