Safety warning flash screen at the beginning of the game (after the game/studio logo screen).
Add a warning icon button with a brief safety message which opens up a pop-up safety checklist wherever the game encourages real-life experimentation or provides real schematics/resources/references.
Design
[ ] The content of the safety messages and the safety procedures checklist.
Useful references : Lessons In Electric Circuits, Volume I – DC, p. 96 (Chapter 3. Electrical safety)