A few more exciting features have been added thanks to your feedback!

Beside some bug fixes, the option to enter practice mode and the left-handed mode have been included in the new version. The "skip piece" button has been deprecated for now as it didn't prove to be really useful, perhaps later if I add the puzzle mode it will become handy and added back.

On a related note, the closed beta for android is about to kick in so if you signed up, be ready to test it over there.