I am using phpArcadeScript v3.0 with a custom template I made myself. It's a clean and professional template, that boasts power and performance while being non-graphically intense and bandwidth saver. It's also a grey tone/orange color scheme.
Your site is very similar to mine, but your logo is better .
Anyway, you should change its color. The dark gray on black doesn't scream "fun". I also recommend making your games (much) larger so that they are more comfortable to play.