Hi WonderArt. I got your message a little late, sorry
I think that the buttons look a little old. The style seems to be outdated. My suggestion would be to try to make the buttons styles of the bodies look more up to date. I also would eliminate the shape in 3D and I would try some more styled shapes (the round corners should be more in accordance to the sizes of the boxes).I hope that helps you for a start.
Thanks friend … I will start working on it soon …