How can I download HTML5 games from a website?

http://ift.tt/1iZHv9S

How can I download HTML5 games from a website? I have read about a method to download SWF games which I have tried and found to work. However, neither Makeuseof.com nor any other site has written any article about downloading HTML5 games. I am writing below the list of some HTML5 games I like and would like want to download:

1. Box jump from http://ift.tt/1nXJZWO


2. Vector Runner Remix from http://ift.tt/1kZ7b6E


3. Contre Jour from http://ift.tt/PSJni7


4. Chrome worldwide maze http://chrome.com/maze/


5. desmos graphing calc from http://ift.tt/o1WtXF
   
   (desmos is a graphing calculator, but it is written in HTML5, so it can also be download in the same way.)

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