If you want to share your spreadsheet from your Google Drive then you need to have proper security settings.
This settings can be done from main menu : File – Share – Publish to web, see the next image:
See the Pen
google_001 by Cătălin George Feștilă (@catafest)
on CodePen.
This is a simple example of sharing, but this can also customize into HTML 5 with a custom GUI interface.