Honestly i dont think its a matter of how fast you play, but HOW you play, kick butt dude, when you feel satisfied with yourself then you're a rock hard shredder
Gouache paints come in many colors and are usually mixed with water to achieve the desired working properties and to control the opicity when dry, also like watercolor, gouache dries to a matte finish. it is similar to acrylic or oil paints in that is normally used in an opaque painting style
Wouldn't it be rhythm, the use of recurring elements to direct the movement of the viewer's eye's through the product of art and give a sense of unity to the composition. correct me if im wrong
I believe that is Erich Korngold.
Hope this helped
Elon John on the photo of rocketman