Add chrome web store link

README.md

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 _.o0 Strider 0o._
 ===============================
 
+Get it from the [Chrome Web Store](https://chrome.google.com/webstore/detail/strider/ojbdlgepnccgakbkapekiifbhjchejnh).
+
 :video_game: [game-off-2015](https://github.com/blog/1990-game-off-iii-everyone-s-a-winner) challenge entry.
 
 The year is 2415. You are _Strider_. An agent of the rebel forces of Atira and Taristol II. Your mission is to infiltrate the government science facility on the moon *Efriador V* and extract all the information available about the development of a new war unit called the *Spitflyer*. You have successfully collected the data required and you now need to head to the extraction point at the top most level of the facility. A transport will be waiting for you to take you to safety.