Super cool concept! I like how the text is reversed since you are viewing it from the boss's perspective! I also like the increasing difficulty. It is probably a little to hard, and I would've told the player a little more directly what to do, since if you don't get that you should be killed by the knight, the game doesn't progress. (maybe if you kill the knight twice?)
Very nice execution though! Seemed like you understood your scope really well and the coolest 'you are the boss' twist I've seen thus far. Selecting your own attack patterns is a really cool twist :)