Icon Design Logo

Hi everyone. Today i was working on the set of icons for my portfolio web-site. And during the experiment with the styles i came up to this one.

Here is one of the service icons, which means "Icon design". I left guides to show you how it appears) Frankly, it's my first expirience in constuction by circles. What do you think, i managed?

Of course, don't forget to check @2x

P.S. Ultimately I choose another flat style for icons=)