They should have a bass clef line also so the bass instruments and lower keyboard ranges can be heard correctly or at all. Either that or an octave function so you can select an A on bass but two octaves down. I would also recomend the range be three octaves of C instead of cutting off at the B. No novice is capable of writing in the keys of Bb or B so the C should be the main focus scale.
I found that all you need after level 3 is roadsters for the begining then razzo's and schnells to kill the oponent, roadsters aare for the begining until you get $15,000 then storm w/ lvl 5 razzos once you reach $50k then storm with schnells to win