For an axed ending it is surprisingly sweet. The jump forward also makes sense to a point. Years go by instantly to her, so having a few decades pass is understandable if a little forced.
@brainman from what was shown in the previous chapters, she might be the spirit of the world itself since when she first woke up, the earth was still a ball of molten rock
@Jackist for a series that was obviously axed, I feel like it had a pretty satisfying conclusion, though I wish we could have seen him interacting with the adult version of all the girls as well.