I picked up "Idols of Ash" on Steam for next to nothing, but holy shit this is a good game. Incredibly simple premise, incredibly fun and challenging to play:

https://store.steampowered.com/app/4450800/Idols_of_Ash/

Imagine spelunking from the surface to the bottom of an impossibly deep pit, but something is hunting you all the way down. I've only played it for like 30 minutes but it's great.