У вашего броузера проблема в совместимости с HTML5
Watch this video in context on the official Unity learn pages -
http://www.unity3d.com/learn/tutorials/topics/scripting/game-ui
In this live training session we will look at creating a multiple choice quiz game. We will create the core game loop - timer, score, win and lose states. We will also show code architecture best practices - keeping data and logic separate, and how to structure a game in a way that makes it easy to maintain and extend. We will look at some of the ways we can extend this in session two.
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http://amara.org/v/0RsB/