Site works for me, but let me give some points worth noting:
– the type on the buttons looks soft/ blurred
– overall contrast could be better. Try to bring out your banner/ logo a bit more. the intense yellow you use will make everything else look rather pale, so you might wanna consider creating your thumbnails with frames to make them more pronounced
– Try to settle for a strict color scheme. I’m not really convinced by your choice of colors. It makes the site just look drab and boring. Keep the yellow, black and blue, get rid of the greenish tones. Always use the same colors for type and backgrounds (the yellow in the banner is different).
– experiment with shapes and forms. If you stick with simpel rectangles, try to come up with some decorative patterns that you can sprinkle in here and there to loosen up things. Try to think of some navigational elements conforming to that style.
Mylenium
[Pour Myl