I'm not sure how to run this. It looks like you might've submitted some of your source files from Unity rather than a built version of the game?
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Step3:
1 year ago(+1)
That would mean that a player needs to have Unity installed in order to play your game. Requiring additional software that you don't provide is technically against the rules of this jam. I won't make a big deal out of it, just be aware of that next time and submit a built version of the game.