Mirror cave

A girl named ___ lives a normal life until she dies. When she wakes up she is not in hell, as one would think. Instead, she is in a damp and cold cave. Upon investigating she sees some inscriptions on the walls that show her the way home through......... OTHER DIMENSIONS?!

Each universe contains a key bearer to the next, she just have to find them and everything will return to normal. Easy......... right?

(universe/dimension suggestions are accepted :3)