it's a simple spring animation main base on css

1. Click on green Clone or download button and choose Download ZIP.
2. Find the downloaded zipped file on your pc and extract it.
3. Go to folder. Inside you will find a file named index.html.
4. Double-click on index.html file and your browser will open (or maybe just a new tab) and the game will start.
5. If for whatever reason your browser does not open, right click on index.html file go down to Open with and choose your web browser. This will open the browser and launch the SpringSimulation.

Once you are done playing, you can close the tab in your browser.

SpringSimulation Demo