Oh, I would love to play your game if you made a web or linux version!
With a web version you will have more people playing your game too (since downloading is kinda annoying ngl)
Actually no, an .exe can only work on windows. Linux and Mac have different formats for an executable.
I guess you got confused because of the unity export menu, it's written Windows, mac and linux but you also have a drop down menu where you select the OS. You need to make a separate build for each operating system.
That sucks ofc, I got to instal the diffrent OS to the unity version. Since I can't and won't be updating the game file on itch.io can I will create custom private link for the page with linux/mac download. Linux and Mac version : https://bordexthedev.itch.io/pump-it-up-linuxmac
Again sorry for the problems and taking up your time. Hope you enjoy the game (: