Things you can do to improve speed without affecting the games are root and overclock your phone, disable the virtual gamepad and use an external joystick (or use one of the "Touch" layouts with the "Show FPS" and "Redraw All" options disabled), reboot your phone before starting the app, use a task manager to kill any unnecessary processes that are running, put the phone in Airplane mod, and make sure you are using the gles2n64 video plug-in if it works for the game you are playing. I'll be adding more optimizations to the code in future updates.