How i get a better results with PageSpeed Insights?

[403 - Forbiddeen]

Hello!

I need help to receive more visits from google, but i have no idea what more i need to do to turn my forum more fast.

https://developers.google.com/speed/pagespeed/insights/?hl=pt-br&url=ggames.com.br

I'm not using any custom theme.

I'm using a dedicate host, with ssd and ngynx. 

By now, only receive 3k unic visits by day.

[CoffeeCake]

Pagespeed insights is showing atrocious values for the default IPS theme.