Thank you for responding so fast, I really appreciate your kindness!! :) So, should I just upload the .exe file for the HTML5 build? Or do I need to zip up every file around it and upload all of them?
Um, no, the HTML5 build runs out of a file with the .html extension. The .exe is for the downloadable build. And I dunno what other files an Unreal game needs; consult Unreal's documentation. Either way, for each build just put all the files it needs in a .zip archive. The downloadable one you can just upload as-is. For HTML5, rename the Han202FinalBackup[...].html file (I think that's the one, since there isn't any other in your screenshot) to index.html inside the archive, then upload.