GTGE menu handling

Hi, everyone!
This is my first post here on JGO.

I’m currently developping a simple 2D plateformer game using GTGE,
I wish to update it step by step.

I’m pretty happy of this library, even if I regret that his support has stopped…
I get to make it work fine, but i have a few minor problems.
I hope someone still uses it and will be able to help.

I’ll start with my main question, and ask others later.

– How could I make a clean menu handling?

I want to reset the content of the gameloader, or make it switch to another Game object.
The solutions I tried happen to keep open and inactive the previous game window, while openning a new one.

Here’s the content of my Main: http://pastebin.java-gaming.org/f9c393f714610