Pretty cool concept for the minimalist art style, and I really liked the shift mechanic. Very good overall!
I think the only issues I found is like someone else said the knockback on getting hit was too extreme, and instead of helping not get hit again, it more often than not bounced the character against another obstacle/enemy. And also the bouncing ball sound effects were really grating, to the point that I had to mute the game despite everything else soundwise being good (I played by downloading it as you recommended)