In 2005, I had written a Puzzle Game. It is a standalone web application written in Python and Pyjamas.
Its a simple game where you need to arrange all numbers in a ascending order. You need to simply click on a button to move button at blank space.
You can find the source code on my Github repository. See Puzzle-Game. Go through the README on how to run a demo.
See the snapshot of how it looks like when you execute a demo.