Cool! This looks similar to my submission in a way, similar concept but the control scheme differs a bit. I'm curious how you implemented the line drawing behind the ball, that was something I was thinking of doing but ended up scraping the whole idea since I though it would not add anything to the game. Works very well in yours though since the object you control is pushed much further up the screen.
I liked how the movement area expands after some time! Good work :)