My time in the story mode was 04:16:49 and in the speedrun it was 02:14:82. However, with the speedrun the levels are in the reversed order and there is no glitch thingy. I remember that one of the first levels in story mode was really hard. I think it was the mirrored level with the squares rotated onto their point. The slipperiness of the squares makes it immensely difficult.