It's a great idea and very well executed!
It is a little bit strange at first to get used to the turns, as you can just go back and fourth for quite a while until you realise that you need to push "left" and not "right", but this is part of the puzzles, right?
Great little gem! Well done!
I've donwloaded it fine, no issues really...
And got out with alt-x, no issues there either, although a quit option would be a big plus for the game, as Vince says.
Thanks for this great game!