Subtlety isn’t on offer in Navot Papushado’s assassin actioner “Gunpowder Milkshake,” though nearly everything else is, from enough neon lights to make Vegas jealous, a nefarious group of bad men known as “The Firm,” to Karen Gillan beating up baddies with a panda-shaped suitcase, blood the consistency of Jell-o, and an extended sequence involving Michelle Yeoh killing dudes with a chain. These aren’t even the highlights, but simply a brief selection of standouts moments from the Netflix Original, which . Featuring Karen Gillan in a genuinely butt-kicking role, Papushado’s film joins a growing sub-genre of all-female action outings, but its winking sense of humor seems primed to help it stand out.

Set in and around a nameless European city — the film was shot mostly in Germany, but there’s something purposely anonymous about the world Sam (Gillan) and her compatriots and antagonizers alike occupy — “Gunpowder Milkshake” opens...