I never played Sinistar, but I too think that games like those are what you'd call pure. Colors, shapes, scoring bonuses, power-ups. Those things are Video Games, no matter how finely clad in 4k graphics and 'narrative-driven stealth combat' (Sekiro).anyone else remember SINISTAR? Games like those were so simple, and yet had such depth...obviously dependent on human imagination, but still; that's the beauty.
I've been looking for one of those good old space blaster, bullet-hell type of games myself.