I realized towards the end of the jam that the game had no jam logo (just a normal mention in the credits), and added some lines to the script file as well as the logo file itself, which I then just added to the PC file, so that it would meet the requirements.
Thank you for the information, I now marked the jam logo version as Windows only - the original versions are untouched and should work no problems.
And thank you for playing and putting up such detailed comments, I really appreciate you taking so much time to do this!