I say you ruined it because I happen to respect the classic game boy (hell, I still play it on occasion!). and as for the rest of my critiques, might I just say "the devil is in the details" You say you wanted a "rusted" look? Have you ever seen bronze rust? No.. because it doesn't, it ->TARNISHES<-. and for a Good steampunk look, you need to think about what the materials you put on it do as well as the prevailing tech look of the Victorian era.
Well I didn't make this for you to be honest, and I wouldn't call your comments "critiques" by any means. Many people seem to like what I've done, as do I, and if you will notice this is my first attempt at any design in this fashion. If you're going to try and give criticism at least make it constructive.