Very nice, good composition and a sweet concept. The landscape is very similar to my local area, Somerset, so I recognise the pollarded willow

My boots are covered with this mud too!
If you feel like developing it further maybe some boot, paw, hoof and vehicle tracks mixed in with the mud.
I agree about the leaves, this close you would normally use textured and opacity masked leaves, is this not a possibility for you? What program did you make the willow in? The same would be true of the daffs, you'll get a better result, less saturated if you use a texture on the flowers and a translucency map on the flowers.
Cheers
Richard