Marble Zone Act 1 Wall Clip Analysis

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DEFINITIVE RESULTS:
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All taken from x pos $0610, facing left (clip is pixel perfect nevertheless).

The wall cycles from y pos $0200 (top) to $0230 (bottom), 97 possible pixels.

xpos
200: 00-FF right, 256/256 * 100 = 100% guaranteed successful zip.
201: 00-FF right, 256/256 * 100 = 100% guaranteed successful zip.
202: 00-8F left, 90-FF right, 112/256 * 100 = 43.75% successful zip.
203: 00-FF left, 0/256 * 100 = 0% chance of a zip.
204: 00-FF left, 0/256 * 100 = 0% chance of a zip.
...
208: 00-FF left, 0/256 * 100 = 0% chance of a zip.
...
21A: 0% chance.
21B: 0% chance.
21C: 0% chance.
21D: 0% chance.
21E: 0% chance.
21F: 0% chance.
220: 00-2F death, 30-FF left, 48/256 * 100 = 18.75% chance of death.
221: 100% chance of death.
...
230: 100% chance of death.

Note that the wall velocity is periodic so it might be easier to hit the first (especially) and last few pixels assuming you keep pace.