No recommendation, this game is just a prototype, the gameplay doesn't really work yet.
Game Jam comment
This game was created for a game jam, but it has clearly missed the point of it, because there is a HUGE number of pre-existing mods, but the goal was to create game from scratch. Using some existing code is OK, but this one apparently includes half of Minetest Game and the Technic mod and even more; that's way too much for a game jam IMHO. For that reason alone I cannot give a good rating for this game jam submission. The README lists the pre-existing mods. The only mod that is not listed is weld_all. I looked at this and apparently it is responsible for the checmicals sampler and supply rocket and missions. This is a bit too little effort IMHO. The bulk of this game is this clearly carried by the other mods.
But I am going to pretend I'm not aware of that …
This is very clearly an alpha stage game. Not even the moon gravity is working! And everything about this game I have to get from the README. At first, the README told me I had to install an inventory mod myself. :( Then I tried to start with farming. This part worked, but growth is slow and boring. Unfortunately, I quickly got stuck as I have been unable to produce power for the technic machines. The game doesn't even tell me how the basic Technic stuff works, but I still remembered the basics. Sadly, the solar panels don't work, and that's apparently the only way to operate a working furnace, so I can't even cook glass, apparently, so I came to a screeching halt. And then I lost interest.
Graphics, sounds, controls, etc.
No comment, most content is just copied from other games/mods.
Can you please have a look into this specific world if your solar panels were built below y=0?
When I join a server that is using technic mod, I don´t get instructions either. But maybe, for a game, things should be more self-explanatory. I will give it a try as soon as I have made my way through the other things you mentioned.
OK, the solar panel does not work below Y=0 but it does work above. Weird.
And yeah, I absolutely thing that if this is meant as a standlone, you can't expect players to know the ins and outs of Technic. Complete newcomers might not even know what Technic is. Servers are different.