<level code>

- seems to always be 125? ; maxfall distance in pixels
<release rate>
<number of lemmings>
<save requirement>
<time limit in minutes>
<skill counts in normal order, one per line>
<screen start position>
# object data
<piece index number>
<X position>
<Y position>

; visible on terrain only

; full, invert etc
--- repeat for each object
End
# terrain data
<piece index number>
<X position>
<Y position>

- I assume this in some way encodes the No Overwrite, Invert and Erase settings? yes
--- repeat for each terrain piece
End
# steel data
<X position>
<Y position>
<width>
<height>
--- repeat for each steel area
End
0 screen back red
32 green
48 blue
a line here can be a background image