I've got a great idea for the sounds. Before I get into what I want to say, here's a scenario:
Imagine you're making a song (Canon in D by Pachabel for example)
You are happily putting down blocks with the sounds when you reach to a point where the note must be "held" for a certain amount of time. The solution, repeat the block once or twice, but in the end, it sounded terrible. You thought, " they must add a "hold sound" block".
So, what I'm saying is that we should add a hold sound block so we don't have to repeat that one note/sound. I think this is also useful for other sounds like the sound of a car, so it may seem like a car is moving fast, or the sound of the rain. Continuous "pattering" of the water.
About the notes, sometimes you need a higher note.
So what do you say?
We need these things
I'd just go for the "hold sound" thingy
I'd just go for more notes