It is so great that your daughter is so excited by her writing!
Caveat: Do NOT start bugging her about her spelling. Especially as related to these stories. You will take the joy out of her writing, and she will stop doing it. I have learned by this mistake.
Take the stories, read them out loud with her, get excited about them, and then let her teacher teach her how to spell properly. This is a really important time in which you can make the difference between her being excited about learning, or bogged down in perfectionism.
She is very young, and she's doing great already!! Don't say another word! Just encourage this wonderful writing. Have fun!
"Education is the lighting of a fire, not the filling of a bucket."
p.s. If this doesn't make sense to you, imagine if you have just done something you were really proud of, and were sharing it with someone, and instead of sharing your joy with you, they instead told you what you should have done to make it better. If you really imagine this scenario in your head, you will understand why it's harmful to push the spelling issue in this instance.