It was ok.
As a musician myself (the youngest violinist to ever join our civic orchestra) this intrigued me, but after playing this "game" I found it quite boring. I had already worked out all of these songs myself on the piano straight from the original music on my own NES which I'd have playing behind me, so none of this was new to me, though I found it quite juvenile, with it just being the melody easily played with one finger, and if that wasn't enough, I noticed many notes and rhythms were incorrect, as well as the numerous WILD fluctuations in tempi, it made it almost unbearable to listen to.
But I understand this wasn't made for people like me, it was made for those who may have a piano in their house but have never touched it, or any other instrument, and with that in mind, this did it's purpose pretty well. But in saying that, I didn't find it entertaining at all.
This was slightly above average.
6/10