I would really not go with the pink on green colors. Especially as you are doing a vintage theme. I think you should play around with keeping the room and title in black and white and having the colors only in the toys.
As a person with little to no experience in web design, I think your site looks great. It is extremely attractive, clear, uncluttered, and easy to navigate. The only thing I would recommend is to be sure that your images are optimized for the web. Try the site with a slow internet connection...
I am not usually a big fan of GameStop because I feel that their games are over priced and you can re-sell your games for much better profit on ebay or craigslist but... If you are really unsure which game to spend your money on, you do have 7 days to make up your mind with GameStop pre-owned...