Custom Difficulty Gauge

[soulkata]

Hi, The game offers fixed Dificulties (Builder mode (5%), Casual (30%), Rough (60%), Challenge (100%), Serious Challenge (130%), Extreme Challenge (160%))... It will be nice have a Input to the user specify the dificulty...

Some sample cenarios:
* The game in 60% is too Easy, and at 100% is too Hard, the user can ajust to 80%!!!
* Some very experined players want to play at 300% normal difficulty!!
* Some mods unbalance the game, a custom difficulty can retake de challenge!!