I take that since your website didn't state any call limit, you must be using the second method (parsing google image result page). Give user option to get mor

I take that since your website didn't state any call limit, you must be using the second method (parsing google image result page). Give user option to get more photo (in ways like: /1, /2) as the index of result page. Or even randomize the result (provide an option to random deliver the result, so same call doesn't result in the same image) might serve the user good. lots of ideas.