I've once again confirmed today that steel does not behave as intended in *Lemmini*.
Simple Autosteel = Steel is always steel, wherever it exists, even if behind terrain. This works fine
Autosteel = Steel is only steel where it's visible. This does NOT work; we get Simple Autosteel behaviour instead
Manual = Steel is only steel where a steel area has been manually added. This works fine
Meanwhile, Classic Steel works but is essentially just badly-behaved steel areas that don't align properly with pieces and which can sometimes be destroyed given the right setup. This will be removed from RetroLemmini at some point, although the currently-in-the-works Level Editor (yep, you heard that right!) will continue to support it behind the scenes for backwards compatibility.
Simple Autosteel = Steel is always steel, wherever it exists, even if behind terrain. This works fine
Autosteel = Steel is only steel where it's visible. This does NOT work; we get Simple Autosteel behaviour instead
Manual = Steel is only steel where a steel area has been manually added. This works fine
Meanwhile, Classic Steel works but is essentially just badly-behaved steel areas that don't align properly with pieces and which can sometimes be destroyed given the right setup. This will be removed from RetroLemmini at some point, although the currently-in-the-works Level Editor (yep, you heard that right!) will continue to support it behind the scenes for backwards compatibility.

Piece Browser
My replays are attached.
