Fix spelling of 'Ctrl'
new UI for level 1, 2 and 3
Merge pull request #24 from mhartl/fix-typo

Fix spelling of 'Ctrl'
added tutorials, hide comments by default
merges trevorgunn manually
Revert "merges trevorgunn manually"

This reverts commit 134a93e032c2b3adb08c84c6acf0f14702f8eb89.
Changes to next level link (pull request trevorgunn)

merges manually