I wondered if it was for a class based on the file name. I don't think it needs multiple endings, and the spinning is a cool mechanic that you don't see anywhere else. It does seem like a metaphor for time seeming to extend forever. Alternate endings might have been cool because they add more replay value, but they aren't necessary
I know the feeling of working on an assignment when ill all too well. I hope you get a good grade for this!
Will you be posting more of your finished assignments here?