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Ok, let me know if that works

Your source is misconfigured. Your source needs to be everything a user needs to download your project and open it in Unity. It should look like this: https://github.com/icepol/DeathIsOnlyTheBeginning

I dont know how to upload source code to github, and when I tried to make a new repository it said the file was too big

You don't have to use GitHub, you just need to make sure your source includes the Assets, Packages, and ProjectSettings folders.

It looks correct now though :)