Some of the correct characters cannot be reached without passing through incorrect ones.
At times, after a while, the colour of the playable character does not line up with the colour of the correct character.
A jump button that is further from the WASD keys would be helpful. I would recommend arrow keys and space bar to jump.
I did not learn anything, at least not that I'm aware of, owing to the speed and shifting colours.
[({R.G.)}]