Hey thanks man, very helpful feedback!
Yeah Im a music student myself but I normally take aaaaages on my songs so it was refreshing to have to get this piece done in like 3 hours. Its so simple as well; the melody hardly changes and the left hand plays almost exactly the same rising 5ths pattern throughout, just on different chords.
Yeah the controls are a whole heap of problems. Your arrow idea is one we will consider if we make this a full game. Theres also the suggestion of an undo and global direction controls which we'll have to toss up between.