Excellent work!
The Pz II is the perfect first model. I had to look hard to offer suggestions, but if I had to make comments for improvement it would be:
1. tone down the shovel a little so it isnt just silver
2. tone down the decals a little so they are not so bright compared to the weathered look on the model
3. add a base because the panzer doesnt look to fierce on the carpet :P
4. (optional) figures? :)
Again, my comments are made after looking hard at your model, it looks sweet!
SO.... WHATS NEXT? :)