Thanks to the save state system, you can save progress at any time and return back to it instantly. Of course it does not just emulate the hardware. You can also make your GB games colorful by selecting a custom palette. Special features including link cable, rumble, and tilt sensor are also supported. It emulates accurately almost every aspect of the real hardware. My OldBoy! is a full-featured and super-fast emulator to run Game Boy and Game Boy Color games on the broadest range of Android devices, from very low-end phones to modern tablets.