Problem:
the bat boost in 2-2C can put Ryu a half-pixel more to the left—enough to reach the exit a frame sooner in this case. But that change would make the next tosser throw an unavoidable knife, negating that tiny improvement.
Solution:
- use spin slash instead of windmill star to clear 2-2A (-1)
- take better 2-2C bat boost. now the upcoming tosser cooperates because of the different timing. (-1)
- kill one enemy with down+b due to lack of ninpo (+1)
- act II ends a frame sooner (0-1-1+1=-1)
But none of that matters. The tosser-boost in 3-2 is acting as a gatekeeper, and it would take at least another 2 frames of improvement before 3-2 to get past him.