Source Control to the rescue!
As the 40th Ludum Dare is just a few hours away I remember some questions I always get asked.
One is what can you do when your code/project gets screwed up?
In some cases it's just that some files or scenes can't be loaded anymore or that by mistake the files or code got overwritten and this is easy to prevent.
I prefer to use a remote or local source control system like git or svn. Also when you are the only one who works on the project! It really can save your progress.
Every time you make a change commit your work and you get a version you can revert to if something bad happens. It also makes it possible to check code or assets you have created before and are not there anymore.
So while you are waiting maybe think about using a source control system to backup your work. You can find some great tutorials on YouTube. Also I prefer tortoise explorer integrations when you are on windows.
I wish everyone a great Ludum Dare!