In drawing games, no need to have done studies in arts. You draw with a pencil or a brush, and you will need to draw lines that will be transformed into solid forms.
Sometimes, it's just to guide a vehicle such as a motorcycle or even a sledge. In other games, this avoids that shapes fall outside the defined marks.
Finally, there are also drawing games where you must draw a form as soon as possible.
If you're lucky, you'll find a game in which you also have an eraser to erase your drawing if you are not satisfied.