Gadget-Library works fine, but can be a bit finicky; eventually had it subjugated under my Divine Command, though. Here's the final (I think) design of the Pre-Menu:


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First draft of Pre-Menu (via GadgetLib) ... cuz reasons, Editor always works in Windowed Mode, for Game you may choose.
"Reroll World Seed"-Checkbox will later be part of the actual ingame menu, with more options.

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