Up to date info is great for any site – great job and keep it up. I would add a few text links in that content to increase conversions.
Often those designing their own website will start out using monochromatic colors, such as many shades of blue, and find that their pages are pleasing but that nothing stands out. Changing to an analogic (base color, neighbor, and complimentary) scheme may help solve this problem.
Also I notice that you forgot to add http:nl.towergaming.com
Also feel free to ask for free flash games to help increase time on your site.
Just a few thoughts – good luck – hard work always pays off 
and feel free to PM if you need any help.