Thanks for the feedback, the music can be turned off on the upper left (but turns on again each level). Good point with the sprite size I was going for casual relaxing play and thought simple was ok (he definitely could be more exciting maybe a trail? would add a little something).
In regards to the bounds I wanted to to collision bounce back but also felt may take away from the smooth flight. I think if I want to fix it I will need to Hi-jack the controls and arc him back towards the play area and return control after x seconds (something like that maybe).
I spend the last stretch trying to make a high score board and the clock beat me :(
I notice heaps of games hear remember local best time I didn't know web based games could do this, I am going to look into that as Hosting is not something I have mastered,