In development by Jihye Sofia Seo https://www.linkedin.com/in/jihyeseo
forked from the code of another game Slide Puzzle by Al Sweigart
http://inventwithpython.com/pygame/chapter4.html
whose books are very helpful for learning Python and PyGame.
Many thanks!
The final goal is an autoplay with computer vision, so that one can earn more scores in a mobile game "Tiny Farm - Safari Game" http://tinyfarm.wikia.com/wiki/Tiny_Zoo