Hello! The build is only for PCs, but other than that, it should run on any system.
If the download fails when you try to download directly from the website, it might be an issue with your internet or itch. If this is the case you should be able to simply re-try the download in your "download history" in your browser and it should continue where the download left off.
If this isn't the issue it might be a problem with your disk space. Check to see if you have enough space to download the game.
If none of this helps please elaborate on the download issue and I'll try my best to help you get the game good to go!