Badges update automatically and link to the resource pack page on MineUniverse.
The only thing this pack does is that it makes your XP bar rainbow. That's it, that's the add-on.
OptiFine is recommended, but not needed. (the only thing it allows me to do is modify the colour of the XP level number)
Since this is an add-on, you'll need to place it above the faithful pack in the resource pack menu.
