The Challenge is now open for entries.
That's what the late, great Ray Bradbury told me. Stay awesome Rafellin.
I've finished my story, it's only 150 words but I can't think how to 'pad it out'
There's an awful lot of time left, @Luiglin. Hang in there! Sometimes, too, if you walk away from a story for a few days, then return, it becomes obvious what might be wrong with the first attempt and the piece can be resurrected.
Sometimes, though, starting over is best. But there is a lot of time left, go for a long walk or two and I bet your muse will visit.