Sure, I can add such an option. So should the levels just disappear immediately? Or with a simpler animation when the level smoothly turns black?
I have no experience with people sensitive to flashing lights. In Bringris, the corners of the screen are also flashing (in some sense) while you move the piece. And probably in some other situations, depending on what you have built and how you move. Is this not a problem for them? That would be more difficult to solve.