We are playing flappy bird. Not any knock offs. When you have an Android phone, you can get and play anything, even things that are not on the network anymore without the need for jailbreak problems like the iPhone. There are links already in this thread with a place to get it. Then go to the app store on your phone and search App Installer. I use APK installer, the icon is a box with the Android on it. Then hook your phone to your PC and add the .APK file that you downloaded off the previous mentioned website to the download folder on your phone. Open APK installer, and install the app through it. Takes just a few seconds actually, and is really easy, unlike iPhone
Personal note: I take no responsibility about your phone and custom app installs. Get them only from trusted sites and yes, there is always a risk involved.