Watching this. I'm halfway through.
It's a facility with vertical cells with a lift in a middle where the food is moved down. At every level they eat what they want or can, leave the rest. I won't spoiler more, in case Bernd wanna watch it at some point, but this is the core of the tension.
Actors are okay. The scenes are simple since they play in a cell basically, the idea behind it is unusual and this makes it good.
It's 2019 movie, apparently Spanish/Basque.