Apart from the fact that we spawned in Mordor and had to struggle for our lives in the first hour it was easy to get into due to the similarity to Minecraft, yet different and challenging. It feels like an actual game with fully functional gameplay with few rough edges left.
Exploration, Farming (though my crops seem to be quite slow to grow), Different Races, Mining, Creative Building, Survival - it is all there.
There is some guidance, but it is also quite intuitive. And there is some info on the wiki: https://wiki.minetest.net/Special:WhatLinksHere/Games/Lord_of_the_Test
My favorite so far next to NodeCore.
By the way, despite being a great game, I don't think this deserves the "One-of-a-kind / Original" tag - there are multiple games in that direction, and the concept is not new. I think this tag is generally a bit overused, tags should be voted by the community.
The first Minetest game I played that feels quite polished.
A novel concept of health and crafting, with puzzling rather than survival as focus.
Should have known earlier that there are hints in the inventory and that crafting works vertically rather than horizontally - I thought I would have to arrange 8 planks in a box like in a Minecraft Crafting Grid to make a chest and the like. Because than I wouldn't have looked up so much in the wiki, which is much more helpful than e.g. in Exile though :)
Just missing some ambience, I guess that could be aided by finer textures and some select sounds and music.
The game is probably very well developed, but I just can't get into it.
We played almost 10 hours as a group of 4 and only managed to get a spear, beds, and woven clothing.
No idea how to cook, fire clay, find food and water - so we keep on dying. Suggestions from the wiki like water puddle holes don't work.
The wiki in general is rather chaotic and has little useful information.
Beds apparently skip the night in Minetest original, is this possible here?
Mobs don't seem to move properly.
It reminded me somewhat of TerraFirmaPunk, a Minecraft TerraFirmaCraft modpack.
Maybe you could take some inspiration from its Quest Book and mechanisms as well.