This game is beautiful!!!
It seems like you really know how to tell a story through gameplay. You tell it in the way you design the levels, in the effects, the mechanics, the music... amazing! This is the kind of thing I've been studying for a while now, and I want to learn from games like these so I can improve my own project.
(And the "trick" on level 5 that represents moving further away from reality, the fake goal, was brilliant! Also the reversed control when the ball turns red!)
Music, sfx, controls, concept, difficulty, (especially) story... all of it was basically perfect for me. Amazing job!!