PLEASE NOTE: This review is written for the 2021 Minetest Game Jam version of this game, by a PARTICIPANT. I used Minetest version 5.4.1 to playtest.
Incomplete game. You can only generate a map (apparently random?) with a chat command and drive with a kart around. There is no gameplay, like actual races, time-trail, or anything else you expect from "normal" racing games. It seems this game was not finished in time. Sorry, I just can't click in good faith click "Recommend" for incomplete games.