Is he even interested in the game, or was it your idea?
I would suggest not starting him on video games as the first use of a computer. How about typing simple things into a word processor instead? I would be concerned of the high potential for addiction especially in such an early phase of brain development to start them on those games. The kids should be learning to interact with
people. Also for a kid this young too much indoor time could actually result in vision problems later on:
Myopia increasing: Indoor light may be impairing children’s vision.