It's a good starting point.
The only issue I have are the first 3 notes. I think there's too much of a delay between them (Literally miliseconds). I'd like to see this develop though!
Cheers, I've noticed that myself but they are very difficult to change since that is the shortest the notes can be in Garageband without entering 'time' mode which messes up the timings for the rest of the music. I'll have a look at how I can stop that from happening.