There should also be also be variable speeds like
* Adagio - slowly
* Largo - slowly and broadly
* Lento - "slow" but usually only moderately so
* Andante - at a walking pace
* Moderato - at a moderate tempo, neither fast nor slow
* Allegretto - "a little allegro", understood to be not quite as fast as allegro
* Allegro - quickly
* Vivace - very fast, lively and brisk
* Presto - fast
* Prestissimo - very, very fast.
(could be arranged numerically 1-10)
there should also be able to set the scale(c-major,minor, etc.)
If someone wanted to go hard core they could make it a visual plugin with measures and various note types(whole, half-note, quarter,eighth, sixteenth) (same with rests) also impliment time signatures like 3/4, 4/4,