Well, the thing is...although some icons are bad designed, the most flaw is in the bright, and the over saturation of the colours. Also, the circle of the itunes and app store are too big. Look, i made this fast mockup to show you that it does give a "not so childish feel" when the colours are not so bright. PD: I dont undestand the safari icon honestly. I made this in one minute. The white space around the icon is just stupPid.