We can understand. The DS is the best invention since antiseptics, in our eyes, completely revolutionizing our life and bringing peace to the world. It's a device that could probably travel back in time, get into the ring with the great Muhammad Ali and knock him out in two rounds (the DS would spend the first round dancing circles around Ali, humiliating him before going in for the kill in the second round). The DS is our own personal super hero.
So, we can appreciate this mod that puts a touch-screen into a Game Boy Color. But, you may wonder how the controls actually work. See, different areas of the touch-screen are mapped to corresponding buttons, with a majority of the screen being assigned to the d-pad. It's not as exact to the DS, but it's close enough for us.