Well I haven't done one of these before so here goes.

As an artist I think its great you use a very nice technique with the lineart which I find fascinating. The colours work well with the art piece. The shading and lighting is awesome as well and its in the right place of the shading and lighting too.

Now the background is very nice I like the way it works well like the checked backing works nicely with the rainbow sort of colours and to top it the white paint splat is very nice.

Altogether it all fits nicely as one awesome picture, keep up the awesome work Hannah.^^