I was wondering if there was a way to make money off of here like by adding ads or something?
You could contact companies and see if they would pay you to have their ad in the game!
(note they would pay like 10c for you to do it, if you are lucky!)
Well you can post adds on your website that has the game on it. Though I dislike the idea, it is a question and I answered it 
Also, with permission of the site creator of course, if you pay for the ability to place apps on the Google play store, you could make money there. If paying for that is to much, you could just make the game an APK, which are apps and charge for it.