Excellent dodging game, although I was initially confused on whether or not I needed to use the jump button. The jump mechanic itself was lovely, though; for lack of a better term, it feels "smooth" and "organic". It's really fun especially when I hold the jump button and move the character from side-to-side.
That leads to a slight problem, however, since the "jump" button is the same as the "no" button in the "Game Over" screen. Thus, if I was holding the "jump" button when the game ends, even though I am technically asked whether or not I want to continue, from my POV as a player, it seems like I skip that part and get taken straight to the title screen. Consider using non-gameplay buttons for the "Game Over" screen.
The sprites could benefit from a larger size, though, whether by increasing the number of pixels or the scale. As it is, I can barely make out the figure of the player but, due to the small size and the fast speed, I could not discern what the falling pieces are. They look like steel orbs with colored outlines, I guess. The sky and the clouds were a nice touch, though, as well as the "idle" animation of the character.