I hate to say it, but you forgot 1 MAJOR detail to beat SM64 with your feet.
HOW ARE YOU SUPPOSED TO ACCESS THE "Z" BUTTON TO PERFORM ALL THE DIFFERENT JUMP KINDS?
It is impossible to get that back button.
Anyway, another reason I prefer Yoshi's Island for feet beating is because the "L" and "R" buttons are not that important, so... You can reach all important buttons with your feet easily and without pulling something... oh yea, I beat 3-4 somehow and am on to the hardest level to beat with your feet until 4-4 in my opinion, 3-5. Other levels I think I may have a hard time with:
4-3
4-4
4-8 (The boss may actually pose a challenge)
5-3
5-7 (The last part)
5-8 (See 4-8)
6-3 (I bet this one will be the hardest in the game.... maybe 6-7, but still)
6-5 (Ugh..... self-scroller)
6-7 (see comment for 6-3)
The rest of the levels should be EASY.
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What? Someone made a really dumb comment? This looks like a job for...
CYNICMAN!!!!!
That''s right! CynicMan, protector of tactlessness, enforcer of raw, abusive sarcasm!
Cynicman: What kind of introduction is THAT? It''s not even a sentence!