Excellent first wallpaper. Nice clarity in the vector and good use of patterns and colours. Just a few things I noticed though:

- The sharp swirls on the left don't meet up properly. Try altering the curves to make this so
- On the top swirl, there is a slight kink in the pink line which needs altering. Also the lines to the side of it don't look right so I'd remove them and make it so that the lines only appear on the circle shapes
- The text is nice but the underlining shape doesn't look good. Make it sharp and blend it into the background some more or get rid of it altogether.

But as I said, it's a superb first wallpaper. Long may the great work continue. Ganbatte!