When you run the program it will ask you if you have an Android phone. If so, you can link it to the program and sync all your apps and documents with the account your are using at that moment. If, otherwise, you don't have an Android phone, it doesn't matter--you can download apps and use them anyways.
To download apps, all you have to do is type the name of the one you are looking for and click the download button. Within seconds it will be ready to run on your computer. Of course, it will be your mouse that acts as your finger on all the games, thus making it possible to intuitively play Angry Birds Space, or any other free game from Google Play, for example.
The program options allow you to configure both the language of the device as well as the controls. For example, you can choose to have the phone's accelerometer be controlled by the arrow keys on the keyboard. Thus you won't have any problems playing any game.
BlueStacks App Player is a fantastic tool that offers a new world of options for any PC user, who can use all the apps from Google Play and all that it entails.