The Xbox Lode Runner doesn't have exit ladders, instead it has exit phase blocks that either phase in or out once when you complete the level. I liked the idea so I've added it to Lode Runner Online: The Mad Monks' Revenge rewrite.
The shot below indicates the phase blocks and is of level 2, stage 2 (ruins) which was taken from this YouTube video.
Red X marks the phase block
Below is a recreation of the same puzzle. I had to make one modification in the centre since Lode Runner Online: The Mad Monks' Revenge doesn't support gold hanging from the side of blocks. Two things are very obvious when you see the games side-by-side; how pretty the Xbox version is and how small the puzzles are. I'm not sure why they are small - pretty much the whole game hasn't any puzzles much larger than this one.
Exit phase blocks!
Granted, the video isn't spectacular but you get the idea. Puzzle designers can go crazy - use the exit phase to reveal a path to a door or throw up some blocks to make the puzzle harder to escape from.