As far as your story goes, the word length is completely up to you. The only limitation you have is the word count accepted by the market(s) you're submitting the story to.

For critiquing, Polished and Ready does have a firm limit of 1000 words or fewer for uploaded stories. However, you do have the option of using any of the Share Your Work forums (password: vista) for feedback, so if your word count is over the limit for P&R, don't worry. (Note: SYW requires members to have at least 50 posts before they can start a new thread there.)

You're going for two stories this week? Go, you!