I found the comment of the person who worked on the game quite valuable!
Anyway, here's my two cents. I've been struggling for quite a long time with what is and what isn't demonic. I think I've been possessed when I was young, but I don't know if it was because of fictional works. My sister, who can see demons, usually was not able to enter the room next to my bedroom, which was filled with movies many of which weren't Christian at all, because of the amount of demons there.
So, going by that, I'd say fiction and works of art (like games) can be dangerous. At the same time, I'm not sure I can trust said sister because she has/had borderline personality disorder (and maybe something else as well, I have no idea) and might have (unintentionally) made up memories.
In any case, knowing my background, and my scepticism, please consider my judgment on Minecraft and fiction in general.
For Minecraft specifically, I haven't found any 'evil' aspects. Yes, it contains some magic things, but they have nothing to do with demons. The magic just "is", there is no story behind it whatsoever. This may sound dangerous to some ("the normalization of magic") but I wouldn't say it is. The lack of a backstory behind it prevents the player from being deeply interested in the magical aspect of the game.
Also, I think the game might be good for creative development.
And, last point on Minecraft: I saw someone comment that a kid "developed" asperger's through this game. First off, Asperger's doesn't officially exist anymore but is now called Autism Spectrum Disorder, or ASD for short. Secondly, ASD is born, not something you *get*. Thirdly, implying that ASD is something inherently evil or wrong is something absolutely devastating to people with ASD. Fourthly, I found that people with ASD tend to be drawn to the computer, and to this game in general. The computer because it does exactly what you want and how you want it (full of logic), and Minecraft for the same reasons, but even more extreme. Minecraft is the pinnacle of logic and choosing what you want to do by yourself. (And, some people might argue that "doing what you want to do" is bad, but I wouldn't say it is. If you have the Holy Spirit, what you want to do will line up with what God wants you to do.)
As on fiction and art in general... I have found a very interesting example from my own life. I've been depressed for a long time, and I've struggled with faith for a long time as well - I'm still struggling with it, but way less than I used to.
I once read a book series. It was everything that people on this site seem to abhor: it had an incredible amount of swearing; extreme violence; religion was played off as naïve, egotistical and stupid; it was pro-violence; depicted sex out of marriage as normal; and, horror of horrors, the two main characters were two guys in a homosexual relationship, and a third almost-main character was of a non-binary gender and/or sex.
How can a book series like that possibly have a good influence on someone's life? I'm not getting into the specifics because once I start talking about this book series I never stop, but it suffices to say that this book series prevented me from committing suicide, and led me to think about things I otherwise never would have thought about, which eventually brought me back to God.
I have trouble with a black and white view of good and evil works of art. The book series I just described seems so clearly "evil", yet it had such a good influence on my life. It leads me to think that there's something to learn from every piece of art, and that none, or at least very few, are truly evil.
But, like I said in the first paragraph, I'm not 100% sure of this view yet, because of the thing with the demons. Nowadays I just decide whether something is good or bad by how it "feels", trusting on the sixth sense that I have a little. (My sister can see demons, I can feel them a little). And, in my view, Minecraft isn't bad.