What’s lurking beneath the surface of this ruthlessly violent horror movie is a glimmer of gold. Happy Death Day is fun enough to be worth watching.

Happy Death Day is “Groundhog Day” dipped in blood, and if the movie isn’t all that clever, it’s just clever enough to get by.

Thankfully never taking itself too seriously, the latest Jason Blum-produced comedy-thriller is happy to carve out its spot as the horror-themed, millennial-focused Groundhog Day, and to have fun doing so. A dynamic lead performance and a willingness to keep things short and snappy also ensure viewers won’t mind venturing into rehash territory.

Landon, who wrote four of the “Paranormal Activity” films, knows a lot about reverse engineering scary scenarios from mundane situations, but as with later installments of that series, he overcomplicates the logistics and mythology of the premise, aiming for something more raucous (and fun) in tone but lacking the intensity — or inevitability — to make its repetition feel truly chilling.

Happy Death Day twists the inherent repetitiveness of slashers to its advantage by exaggerating it to an impossible degree.