moving the last block 1 px to the right.
If by "last block", we mean the final island in the water and not the exit platform, and we move this island 2 hi-res pixels to the right, then all 4 covering replays still pass.
We can, in addition, move the exit platform rightwards by at least 8 hi-res pixels, and all 4 covering replays will still pass. Do we want to move the exit platform, too? E.g., we can move it by 4 hi-respixels, and then re-center everything by moving everything leftwards by 2 pixels.
-- Simon