I have the Android version of Artrage - a truly powerful tool! Now that I've gotten my old Intous up and running, I plan on getting the desktop version as well
When I look at your fox I think you did a great job on the fur, especially on the back/right side. It looks very soft and like real fur to me, great job! I also like your grass and moss. However I think your background is too saturated and look a little overworked. I don't think there's any need for a realistic background, but perhaps hints of nature? I think the fox would stand out on a paler greyish green backround that seem more distant
The face and ears of the fox does not look as consistent as the fur on the back, but I've never drawn fur, so I don't have any tips on how to improve it. Over all I think the fox looks very good