Feeling nostalgic, I decided to dig out my old copy of Lemmings on Game Boy. However, I soon remembered why I never completed the Mayhem section - level 4 appears to be completely impossible due to a bug in the game.
The full layout is the same as Fun 21 listed here. This time I get 14x Climber and 14x Digger. I need to save 14/14 Lemmings. But when the Lemmings climb up the spiral pattern, this happens:
The Lemmings fall through the platform! And unfortunately the fall is too high so they go splat. After ages trying to find a workaround, I found some levels codes online (above link). Incidentally many pages only gave codes up to this level so obviously had the same problem. I'm guessing the passwords I found were extracted from the game's code.
I was going fine until level 16, which also appears to be unsolveable. I am supposed to get a climber to loop round anti-clockwise from the top then left-to-right along the bottom and back up:
However, my climber cannot climb up those diamond objects - he climbs about halfway and falls back down. There are not enough Builders to bridge the gap. (I get: 1x Climber, 14x Floater, 3x Builder, 8x Basher, 3x Digger.)
So my question: Are these levels actually solvable? And is this a known issue with the game? I couldn't find any information online.