The problem is... google drive/dropbox/ etc etc don't always work.
Answer whole game folder so you browse to url/gamefolder/
The index.html makes it work
Your best bet is to host your game online. Found this the other day, its free and works remarkably well. Your own website for free.
Free Web Hosting
I create folders
mygames.url/game1/exported project files
mygames.url/game2/exported project files
And I just browse to mygames.url/game2/
EDIT: I know you said you don't want to be pointed to tutorials, but this is nice walk thru with google drive.
WalkThru with Google DRive