Thank you so much for you feedback.
As you said, music would ad a lot to the feel of the game.
I get the urge to rotate placed tiles.
But the original concept was that you where supposed to match as many cats as you could.
Rotation would make sense if you were supposed to "solve" the puzzle.
This would be a lot clearer if there was a score-counter.
But following your advice to decorate the landing-page, I will clarify it a lot more.
Thanks again.