So I played with him to check it, it ended with me uninstalling it: First time use and you’ll see tons of in-app purchases to build your character (all optional but kids that are starting to read cannot tell the difference), then the app is like the Wild West of ads and special offers.
The Apple store classifies the app as 12+, and I think they are right (as a father I started to see the appeal of the closed App Store and Apple Arcade).
The sad part is that it could be a great platform to experiment creating games and coding, is like the Alan Kay vision of Croquet but perverted by ads.
As an example, I played Bee Swarm Simulator with my daughter and I really enjoyed it. I decided to buy some robux and spend it on the game.I did this not because it gave me something I needed to enjoy the game, but because I felt the developer deserved it for creating something that entertained me.