Dark Sonic Lineart

Just A Little Lineart For The Next Picture I Be Doing Buuuuuuuut I Dont Like It ¬¬ I Need Someone's Opinion On Maybe If I Could Make It Better? ..Please?

Oh, The Gap In The Middle Is For A Chaos Emerald A Bluuuuuuuue Chaos Emerald

Need Advice On Maybe Colouring Technique, Thank Yeeew ^w^

PS. Drawn Directly Onto Comp, Cause I'm Awesome, And If The-Free-Blur Sees This, YES I'M STEALING YOUR LINE!