Mike Dailly | Amiga Lemmings2 Editor @MikeDailly | Uploaded April 2019 | Updated October 2024, 1 day ago.
This is the Lemmings 2 editor that was built right into the game. Based around a character map screen, it has a "pre-built" page to allow for rapid placement of shapes.

This concept was then used in GameMaker Studio 2's new room editor, as it makers tile construction very quick.