all i can say atm is that you should name your page index.html or avoid non-alphanumeric characters (other than space, . , - , and _)
usually you name it index and that's the default page that browsers go to (and the one people should be looking for if you get something like this folder)
or if you do send your webpage to people and it doesn't have an index.html page then say so in a readme.txt
sorry, i should be commenting on your tutorial more than your file structure...