Yo! good job for joining the jam, I have one small feedback to give you, Try to target a web build for your game jam submission as that you can benefits of all devices and OS as well as it does not requires to install the game. (People are afraid to get a malware).
And another thing to keep in mind, When you try to upload a windows build don't upload each folder/file alone on itch.io instead group them inside one folder and compressed as .zip or .rar
as I can tell you didn't upload the data folder.
+1 rate from me.
Good luck!