Okay... you did not have an option for it to be compromised: Master Quest Tower Temple ... or something to that effect.
#1 Yes it looks like a Tower and we have to climb the tower and pass to get higher (or unlock next class and continue within the tower etc)
#2 Yes, as #1 pointed out, this could also be a Temple, and you have to advance (unlock) and gain the power of God with more Stats to help you reach the pinnacle and defeat the enemy. (blah, blah)
Either way we spin it, you could make an Anime about it and derive a story from it (oh, there was a Pun earlier by stating "story" as in "the next level to obtain in the building etc" example, 3rd story of a building to reach the next floor, the 4th floor or story.