Meh. I have seen things like this for a while. As a hardcore Game Boy fan I was never impressed. Mildly interesting, but I have grown bored of case mods of this sort. Not sure when this was made, but there are many aftermarket parts out there that would have made things easier and preserved original hardware.
Actually, there are so many copies of the work of others that one of the important people that created the whole GB modding scene has decided he will stop selling the main parts (cases, buttons, backlights). I wish I had known before he decided that, because he had a lot of things that I wanted to buy from him. Anyway, this is a discussion for another thread.