this is a great game, i love it. it's very polished in all regards.
the music is very soothing and fits the gameplay like a glove.
the game is fun - it's challenging enough so it's not boring or too difficult.
there's a lot of replay value too, as the learning curve lends itself to the enjoyability of the game concept the more you play it.
congratulation to the duo, great work! will be playing it again in the future :)