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.
So … The basics of a kart racing game are present. You can race on a simple race track, there are computer opponents, there are some bonuses that I don't understand. The driving physics seem solid and also the opponents seem to work more or less OK (but I did not test for long). The fact that you managed to get some kind of working AI in that time is really impressive, however, I have to admit.
But the most important thing is missing: There's still no actual game. There is no time-trial, no laps, no actual timekeeping, no actual racing, etc. It seems like an early demo, probably ran out of time. So since the most important aspect of a racing game is missing (i.e. racing), I sadly have to give a thumbs down. Sorry if this sounds harsh, but for 3 weeks of time I expect at least have a basic gameplay. At least playable 1 level/race/time-trial, or anything. Keep in mind the theme of this game jam: "small game". This is small, but not a game (yet). I'd say this thing was CLOSE to a thumbs up from me, but it's not quite there yet.
As for graphics. The racing track isn't really exciting either, the landscape is completely flat. This is probably also on the TODO list, I guess? I like the kart racer models and the kart selection.
Finally, I can 100% say this one is far superior to the other kart game in the game jam (Minekart).