Fun but boring quickly.
It was fun at first, and the idea, even though it's been done before, and recently, was still good, and the dodging the enemy was good as well, which is also what brought the humor, because i'd scream everytime it got close and frantically draw lines around me and run. It got boring too quickly, The repetitive up motion just didn't keep too much attention, try making it sideways instead, like a mario style game where you draw, though you had to collect a certain ammount of the coins to pass. And add in stationary objects that you have to avoid by drawing a way around it. Also, Add more than one kind of pencil. Like, Super jump or super speed lines, that when you land on them, it makes you do whatever it does. Maybe even upgrade to a draw your own level adventure, where you draw the level, and then you play it, giving you a chance to map out your scenario and strategize, while still having a hard time from numerous Objects to avoid.
All in all, it was pretty fun, and a good concept.