Looking for comments/constructive criticism on my video game ecommerce website – how to get more traffic, etc.

Howdy. I recently set up an online store selling Japanese video games. I'm doing it as just a hobby, with the hope of maybe making a few extra dollars on the side. I realize it's a pretty competitive space to get traffic, but I'd really appreciate it if people could give me advice on anything that might help – design changes, etc. The url is www.nagoyaretro.com
Any advice would be much appreciated!