New version uploaded

Uploaded latest build of the demo for those with download keys to try out before release. Some minor changes have been done. A change to some of the music. Two extra levels added and a slight re-ordering. Various minor bugs features. The ability to dynamically change difficulty as you play. Auto increase of difficulty when game is clocked.

The intent is that this is the final build but if play testing how up any bugs there may be a change. No more functionality to add for the demo.