Games may need to be updated to ensure that they are Fire OS 5 compatible. If the game freezes when beginning gameplay, it is most likely due to a conflict with the Android Runtime (ART). Check to make sure that the application is following the current best practices for Android Lollipop. If the game is using Unity 3D, confirm that it was created with the latest version of the game engine.
Information about the Android Runtime (ART) can be found here.
Information about the latest version of Unity 3D can be found here.
Keywords: games, freezes, locks, blank screen