At a first glace, it looks good. Then I notice some random planet floating in the background. Then I thought that for a star to be so shiny that half an owl's face goes white, it should have a fairly intense effect on the floating planet reasonably nearby.
Everyone says that to make abstract signatures is harder than making realistic. That may be true but making realistic signatures require more of a closer look and thought upon things or else it wouldn't be realistic.
Good start though.