You’re getting a lot of downvotes, which I think is related to the audience you’re talking to (computer and game affine) and the fact that Minecraft is generally considered a kid friendly game, so what’s the harm?

That being said, it has zombies, creepers etc. and a 5yo can definitely get scared by it. I’ve seen it happen.

However, I believe any unattended screen time at age 5 to be a much bigger issue in general. The AAP / AACAP recommends a maximum of 60 minutes a day of screen time at that age, and that includes the combined total including TV etc. Many European institutions advocate for a limit of 30 minutes (the AAP recently increased the limit in their recommendations).

Minecraft is a game suitable for kids, but unsupervised media consumption is definitely not a thing at age 5.