Use WASD to move, and don't touch the guard or the executioner! Also, get to the goal in the top right, and hit the magic orbs with your sword to defeat the boss. Double click the green flag to ensure fewer glitches!
Credit to @amoiso and @mrmcrea for the assignment, credit to @griffpatch and @griffpatch_tutor for the gravity, and I am so happy I made my first platformer!