Hey there, it seems you've uploaded your file incorrectly, what you need to do is: 1, go to the folder where your builds are stored (the map where you build your projects), 2, find the map that contains your game and all of the other maps associated with it, 3, select the map from step 2, right click and select "move to - compressed zipped folder", 4, on your game jam page, instead of uploading only the application, upload the zipped folder you just created, if you cant find it, its in the same map as your builds map. and that should do it! Please hurry though, since you only have about 25 minutes left.
Here's a youtube video explaining what i just said: