Before:

To start a quiz, users have to press on the blue boxes. After completion, users earn traits which display on the right. Is there too much noise in here on what a user should do first and do next? I feel like there's too many clickable boxes. Why not make the hierarchy clearer?

After:

The two columns are combined. Not only is the whitespace of the right column removed, the call to action is clearer. Want to unlock a trait? Click on a box to get started on a quiz. Once completed, the trait shows up where the quiz box used to be, creating an association of trait to quiz. Each quiz produces only one trait currently.