Lots of audio and fixes - (v6)

New version!  Thanks for all the positive responses.  It really helps keep me motivated for the project and hope you enjoy this new version.  So what's new?

- Audio - lots more audio in general.  Includes some extra audio cue for longer holds. 

- Another level - should be easier to add levels now that I've got most of the bugs ironed out.  My aim is to have 12 levels then hand it over to the community. 

- Stats - before achievements, I'm now tracking your progress.  This is stored in your browsers local storage so if you play in 'private browsing' you'll lose progress.  Likewise if you clear your history/cookies.  

- Source code! - for any developers who want to see how levels are put together

- Standalone version - not very user friendly sorry as you have to install node.js and then run a short command.  But allows you to play offline for extra comfort and safety. 

(also I realize my versions numbers are a bit messed up for end users sorry, v6 is the second available release). 

Remember, play safe.