Its Great
Completed the boss on normal, then got back to find the bouncy ball. It was all the same levels again, but with the orange bouncy ball. Once i got to "Be Curious" I Just gave up altogether.
Also, i found that the ball sometimes fell through My Line, and that was really irritating, especially on the level where you said "This is what the boss looks like kinda", Where i swooped down, grabbed the top line, and up again, the ball would keep going through my line, and i even started to smooth it out and it still did.
Overall though, Its a clever idea and i enjoyed the game. I completed it in 54 Minutes and 6 seconds :)