You may have to double click the green flag. You must save the ruined castle from the enemies, to achieve your dream of becoming a knight. Use the arrow keys to move, and avoid spikes and lava. Swordsmen just stand there, and archers shoot arrows at you. Jump on the enemies or press space to swing the sword to attack them. You might have to wait a little while before you can pick up the sword.
Thanks to yotacopaco for some of the code, which I found in the game "Platformer Tutorial". The sequel, Archer: https://scratch.mit.edu/projects/474861503 The third in the series, Jester: https://scratch.mit.edu/projects/492662174