Games are like songs: you never get tired of playing the best ones over and over, and you can enjoy them all by yourself.
Movies are for entertainment; books are for learning; games are for mental exercise.
It says it costs $2.99 to install. Is that a one time charge?
Yes. It's that cheap. And it's a good app IMO. I've been using it awhile, and I like the way it has been supported and updated. It started out good and got better.