I don't know how long you have been doing bonsai but you demonstrate a good eye for design. I would suggest however that you start to thin out the foliage pads so that some of the branching is visible. As of now you only have what would be called primary branching. You need to show some secondary branching and as John Naka used to say, provide places for the birds to fly through. This could be a show stopper in a couple of years. Good job in developing raw material into something worth spending time on.