This weekend has been a busy one puzzlewise. It was also a good weekend for me. It was the first time I've done as well as I wanted to do. I won the puzzlefountain competition. At the point of writing this, which is Monday evening, ranked 4th for the puzzle marathon at Logic Masters India, while being fastest for 2 of the puzzles. And I had a good showing on the German Sudoku qualifier even though I lost 10-15 minutes at the start trying to figure out why my printer wouldn't print, while eventually finding out I plugged the USB in a non-USB port. In between that I've been having fun with this month's optimisation puzzle at Logic Masters.de. I recommend giving it a go. It's a fun challenge.
As for this puzzle, it's of medium difficulty. I like the twin concept for heyawake like puzzles.
Rules for Heyawake
In this puzzle, every coloured square shares a border with exactly one other coloured square.