This piece is fantastic, especially considering that it was done entirely with crayons!
The colors are balanced out well, and your technique for the hair looks really neat.
I would, however, suggest smoothing the shading on his suit and possibly on his neck.
You did his grotesque makeup very well, but I think making the streaks fade off a bit more gradually.
As ~M-Infernum noted, I'd try and sharpen the angles on the tie, as well as making the stripes a bit darker so that they show up better.
But those points aside, this piece is stunning! The facial elements are almost perfect, and the shading around the nose is done flawlessly! Keep up the good work, just pay extra attention to the colors and you'll be good!