AllureVimのコメント

Also the game on kongregate is HEAVILY OUTDATED, it would be best to play it at fenglee.com/game/aog

SOLUTION: If you cant play it, the problem may be because plugins were blocked. To play this game you need Unity Webplayer. If you already have it then to unblock it right click on the puzzle with an x icon on the top right of your screen beside the star for bookmarking. (Chrome users) Or simply play the game at fenglee.com/game/aog But you will still need Unity Webplayer but it will run you through steps on how to download it.