No quest line, simply fill up the xp bar and reach the next level, then repeat until you reach the max, along the way you will get to add other characters to the mountain, that's all there is to it.
Oh, ok so it's an XP thing. Gotcha. I thought there would be more questlines and stuff. Thanks guys!
Yes. The XP bar indicates how close you are to the next level. Every time the XP bar fills up, you level up. Unless you're at the highest level, in which case you get bonus donuts.
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Yes. The XP bar indicates how close you are to the next level. Every time the XP bar fills up, you level up. Unless you're at the highest level, in which case you get bonus donuts.