1. I treid beating 1-3 weaponless to see what you mean about that corridor. I first tried it, first i made myself visble to them and then hid in the room i came from once they came close enough i killed them.
2. The 3-3 start is not hard foot only, you don't know how to doge. I don't know if it' a bug but if you walk in a curved line the goons will rarley hit you.
You can't complain about how hard it was foot only, you knew what you were getting into if you finished the game normally.