For that last jump in Barnabus' cave, rather than try to jump directly down to the platform, you can jump towards the wall to limit your vertical travel distance and drop down, rather than trying to adjust your direction in the air, or get the jump distance perfect. If you time it right you can also just walk off the second last platform to land on the moving one, IIRC.
Maybe for the next game, switching to casual mode will turn platforms into ramps.
More realistically, there could be alternate solutions to any required platform jumping, which would give less rewards or experience.
Welcome to the forum.
The game versions would need to be the same in order to transfer saves. I'm not sure how close you would need to get, though (maybe any patched English release would be fine for an English save; maybe there would be issues between retail and digital distributions, or something).
