There is far too much about this game that is counter-intuitive enough that it should have been explained in-game. Like the fact that, contrary to most games with this playstyle, the ball can touch a line in the middle of being drawn without problem but can't touch the object drawing the line. Or the fact that the object comes from whichever side of the screen the mouse is closer to at the time. Even the fact that you have a limited number of lines you can draw and you have to succeed in at least a certain amount of time or fail the level could have been far more clear.