
I have also made some colors of the gui more brighter and i have add a settings menu with all graphic options and three new options for antialiasing (edge smoothing), fullscreen and vsync (vertical synchronization).
But antialiasing works at this time not so well: if its enabled there are small spacings between blocks and that looks not so great

Here is the patch (this time on github ^^): https://github.com/Krisi/minetest
(in the folder data/clienttextures/ are some alternative logo textures in a small and a big size. If someone have a big or very small screen he shell just rename the menulogo-small.png or menulogo-big.png in menulogo.png)
If someone have suggestions for the gui he should write me.
Update1:
Add a listbox to change the window size in the settings menu (fix the fullscreen "bug") and i upload a new logo that should fix the contrast problem.