I was level 9. My girl "Bunny" was "maxed" at level 9 as well. I hit the exp to level up, the exp bar reset, I got no stamina refill, I'm still level 9, and bunny remains "maxed" at level 9. It's like nothing changed.
I'll probably sit this game out for a month or two until they fix some bugs. Fun concept but definitely early beta feel to it.