Im 13 and im writin a short story based on snowwhite plz read and tell me what u think it isnt finished?

Well, you need to improve your punctuation and grammar quite a bit, and your word choices are also a bit off. You are very much writing as someon your age would be expected to- I advise you read a lot if you wish to improve your style. I won't lie- it's a bit bad, really, but given that you're thirteen, I can understand why it is a bit lacking. You probably haven't read books that will really broaden your ideas. Writing isn't just putting coherent sentences on a page; it's also very much about doing that well. Your spelling is quite good comparably, but you tend to rush things and Amy is a bit of a drama queen. I'm not sure what is going on, due to lack of plot as you mentioned, but as it is it's a first-draft with several errors, but nothing irreparable.