A medium demon is a difficulty in a 2D square game called Geometry Dash.
It's way too hard to be easy demon, because you often need at least 4 rounds of practice to complete it (unless you're a god at the game).
It's a difficulty that's accessible to anyone who has beaten at least 5 (real) easy demons.
I beat B by motleyorc as my first medium demon!
I beat VeritY by Serponge as my second medium demon!