Umm i dont really like it to be honest, personally i dont like bland designs, but some people do. I think it looks odd the shape of your thumbnails, would look better square. I'd also suggest using an SEO article in your footer, arcades dont have much text on so give the SE's something to read, doesnt have to be long and can be at the very bottom. I also struggled to read your tags as they are near enough the same colour as the BG. Some good games though.
I agree with LordDan01, it seems a little barren and lacking in design. Your thumbnails should be square, and larger as well.
I think you should change the thumbnail, make it bigger, then write some info or review about the game and I think it would be nicer if you put some color in the background.
u can put some review in ur site, n i dont like ur square thumbnails.. ur mix colour is less atractive.. but overall nice work, u need more improvement to make better.. gud luck..
Nicely laid out. I like the slider at the top. Maybe a better color scheme but keep the white background.