I'll never again draw a circle by using a keyboard -.-
Upscaled by 200%, as always.
This screenshot was made with a real C64 emulator (for better quality), you can find a real C64 screenshot here: fav.me/d74hfu7
Here is a colored concept sketch: fav.me/d7213ow
btw: the black spots in some of the speakers aren't colored because of technical limitations