Hello again HartBloom! I have just tried your game and it's very cool! I have few feedbacks:
My first impression, I don't know if it's a first lvl but it is quite difficult as a beginner and I will begin with a much easier first lvl to take the habit.
I don't think you should leave the number of each bar at this place on the screen and not as big, also the sound which come with is a bit annoying, maybe too loud, maybe modify it.
I am not a fan of the beginning music (maybe because of the compression and all the reverse effect), I will choose something more sweet for the ears, but I like the part when the beat come after you are deeper in the lvl.
As I can't do a really good score I don't know how much sounds and changes there will be but those are my first impression feedbacks.
Otherwise it's a really catchy and beautiful app game, I love it and my girlfriend love it too!
ps: If you want you can send me private message, I am not able yet to open a private discussion myself.