linux executable exported from unity will have ".x86" or ".x86_64".
Some additional info found here:
But you don't have to do it because of me its fine if you dont have time for that :)
No its actually vice versa :D You dont have to help me :) I do this, because this wont be the last game I make. And they should definetly work on all platforms that I think they would work on. Thanks for your help!
I now uploaded a Linux version, please tell me if it works.