Feedback: it's pretty difficult even at the first level. As a distraction, even just easy 2-3 beat patters might be good to start with. So having difficulty levels would be great.
Maybe the difficulty comes from the strength of the haptic engine, but not sure how to easily change that (somewhere in Settings app I'm sure).
That is really nice feedback. The main thing that impacts the difficulty is how off the user's taps can be from the exact timing, and I tried to set it at a level that is not too easy/hard - but that is good feedback and will definitely look into it!
Till then, I would suggest tapping along to the haptics as they occur just to get a feel for the timing. After a couple of tries it should get easier..
Thanks again for trying it out!