just so I know, what files do I actually have to put

Yeah I thought I just had to post the exe, I’m pretty new to unity so I didn’t know 

HI so I have unity engine installed but perhaps it wasn't its issue as soon as i opened it gave dll error then i downloaded dll and it gave data folder issue so i suppose you didn't upload the whole build but just the exe

Always test what you uploaded on itch.io, this isn't how you upload your build.

Sorry this happened, good luck next jam