Oh if you got a bug like that, that's weird! It's not very clear, but once you "level up", a portal appears on the right side of the map. As for health, you have none and cannot die.
Oh I see, maybe I didn't kill enough enemies then. I killed like 5 or 6 then left the level, got back in and killed another few but it felt like it didnt do anything so I assumed it was bugged.
