Augmented Piano Reality- What happened?

This application was one of the first ones that got installed on my phone and it was a feeling of magic to play on a piece of paper, also was my first smart phone so of course after this I thought that there was a whole world of magical applications, 
but no and this one didn't develop further either which is a pity as there must be 
possible to take this concept and do all kinds of fun stuff. 
Well it is for free so try it, 
the important part is to get the drawing right, 
I remember that, 
that took time.

Play Store link:
(Augmented) Piano Reality