Neat! I somehow remember the "R" icon that grows and shrinks, but I don't know from where. Was that a SuperLemmix feature? Or from SuperLemmini?
It's from the Lemmini lineage, which itself borrows the graphic from Windows 95 Lemmings. The animation in the panel is a simple 2-frame animation, so it absolutely could be changed to be the shrinking/growing "R" instead if people prefer that. Or, we could add is as an alternative user mod in the graphics sharing topic.
Also, I see you were having fun toying around with the new skills on "The Grand Puzzle" from Lemmings World Tour... (I assume you took the level file from the unofficial conversion by jkapp
Yes, it's from jkapp's conversion; the original NL version does work in SLX anyway, though. It's a great level, and it's come in very handy for experimenting with various features!