Should you buy this game? If you are looking for a "game", then no. The Story of a Star isn't a game in that sense, you are not gonna find a lot of interaction, or deep, evolving strategies. It is more of an experience.
The app is totally safe for downloading. JMJ Interactive is the developer of The Story of a Star that can be found in the Simulation Games category. The game was downloaded and installed by over 1K users and its latest stable release was on May 14, 2014.
People rated this application 3.4 on Google Play. You can download the installer of The Story of a Star 1.0 free of charge and have a look at users' reviews on Droid Informer. The app works fine on Android 2.2 and above.