The listing, Flux Caves (Steam Key) has ended.
https://store.steampowered.com/app/1086750/Flux_Caves/
About This Game
Your spaceship has crashed on a foreign planet...and there are many challenges and surprises to overcome!
Fix the energy pipes so that enough fuel can reach your spare spaceship, and you'll be able to fly away.
The goal of Flux Caves is for the player to have a peace of mind at the end of a hard day. In this game, there is no losing or dying; here, you can discover peaceful caves and open-world puzzles, all while listening to soothing music and working your brain muscles.
Game runtime is 180-240 minutes.