Lasers – the quintessential weapon for any self-respecting sci-fi hero (or villain). They can bring down robots, starships - even whole worlds.
And yet we all know that, in real life, all that's needed to repel a laser beam is a humble make-up mirror.
It's this inherent reflective bounciness that lies at the heart of GlobalFun's new mobile puzzler, LightUp Challenge.
Aptly enough, it hits its target with laser-like precision.