Original and technically impressive
I think the low score here shows that the users Newgrounds don't appreciate originality - a done-to-death defense game can shoot in at #1 but this gets a modest 3.4something. I'm glad you got Front Page because this deserves some attention.
The line drawing style isn't completely new, I've played a few similar concepts such as Jack Russel. But it's still something that I don't see often, and I haven't seen this idea of drawing to get up as fast as you can.
The difficulty level was just about perfect, it was never impossible to dodge the enemy but very hard to avoid contact at all times to ensure it wouldn't go one forever.
Thing's got a little bit repetitive after a while, there's a lot of things you could add here. Some suggestions:
-Health restores that only appear for a few seconds, for frantic jumping to reach them.
-More things to avoid on screen, maybe randomly placed bombs to avoid.
-The enemy could have a few special attacks to unleash as the game progresses. For example, he could freeze for a second then fire a vertical beam.
-Checkpoints would be good, so that the player can't fall too far without being caught by a fixed barrier. These could also automatically wipe any lines below (the space pressing thing was a bit annoying).
-The background was very simple, I think this could be improved a lot, and also change over time to add some more interest.
I'm working on a similar game at the moment and I know how good the coding is here. Such an engine could spawn a lot of different games, maybe some more bonus games would be good (the drawing game here was a bit pointless, who doesn't have MS Paint?).
This rates in my top ten games for the year so far. I hope you come back with a good follow up. Very good work, 9/10.