1. In the first test I focused on responsive design, HTML5 and SASS and opted to code in pure JavaScript.
Works in IE9, is retina friendly and maintains core functionality even when JavaScript is disabled.

The result can be viewed here.

2. In the second test I focused on achieving a result with the minimal amount of code.
Pure JavaScript, no libs. Tested in IE9, iPad and Android.

The result can be viewed here.

3. All of the source code is available on GitHub: Git Repository

5. API Test: Image

6. The most practical way for cross browser testing. A video on how to install VirtualBox: Installing a VM in under 9 minutes.