When I open it, a window pops up that says fail to load mono, Something like that, how do I fix that?
The common problem is usually because you might be using Windows Explorer to extract the zip file, you can use 7-Zip or WinRAR to extract it instead, if it still errors, there might be some libraries in your Windows that are not installed to support it, or you can play it on the Android build because it uses il2cpp and should be more supported, maybe in the future I will consider using il2cpp on Windows instead of Mono.
Let me know if there are still problems