Awh I'm sad you didn't decide to go through with your original, it was looking really fantastic. And you're brave to reconsider your entire piece mere hours before the deadline, all the more power to you but please be careful xO
Honestly I'd really just buckle down on what you have. 15 hours is not a lot of time for a full piece, and you're bound to stress and mess things up. Imo you're better off taking what work you have and taking it to finish, if something goes wrong again or it crashes it's not going to be happy fun times