Made it to the end! It was challenging at first, but not too bad. I'd say the hardest part was the big fall a the very beginning.
I liked the princess and her animations; the way she moved felt very smooth.
This is not one bit, however. There were many shades of pink and cream on all the geometry, and the black and white checkpoints felt very disconnected from the rest of the art.
I could kind of see what you were trying to get at with the 'falling into madness' thing with the music distortion, but the fact that none of the other elements of the game conveyed a descent into madness I never would've known why the music was distorting if not for the description.
Thanks for creating!