Thanks for the great tutorial. I have found some typos. Feel free to fix them. :>

**/P2-Make-a-Canvas/content.md line 111**
- Size visibleSize = **_CCDirector**_::getInstance()->getVisibleSize();
- Size visibleSize = **_Director**_::getInstance()->getVisibleSize();

**a/P4-Make-it-Pretty/content.md line 131**
- It's very common to declare new types and constant values that will **_are**_
- It's very common to declare new types and constant values that will **_be**_
