You've done a really great job. The concept has been done over and over but you've made it unique again! This looks really good, the effect you used in the middle looks great and the lines are really good. The vibrance of the colours and combination of flat shading and 3D shading works really well. The way you coloured it looks great too, it's great how you've coloured it so it's not the same in every area. You can even see the emotion in Sonic and Tails' eyes and mouth. This is extremely good and the lines, colouring and shading are really impressive.