Very well done, in particular I can see you paid clear attention to where the light would be hitting. Cell shading can be a tricky thing to get right since it's much more 'precise' really, you have to pick and chose what is highlighted and what is not, and have a clear cutoff. You've done so in a way that clearly enhances where the fire is and helps frame the picture better. I recommend adding some rim/edge lighting to the character, perhaps red in tone, since he is standing in front of a blazing fire after all! Good work, thanks for sharing!