I think I found a bug: on day 1, I got curious, explored the desert, and found a note on another bunker. On day 2 nothing happened, I wasn't prompted to do anything, waited a bit, and was prompted to sleep. I assume I was meant to try to meet the person on that bunker and find the note? I suppose it's a more than understandable glitch given the time given.
That said, I still felt like the game lacked a lot of story. The protagonist's tiny, one-room bunker seems meant to be claustrophobic and sad, but together with the lack of expanding upon the plot (only mentioned in the description) it just made me confused. Where does the protagonist get food? What is the windmaker for? Does it create electricity? Food? Does it just fight off sandstorms? Why do sandstorms matter underground? Day 3 felt like one big letdown, as the protagonist's reaction to the windmaker's malfunction made me just lose interest in the concept, as the worldbuilding felt empty.
This game seems like it wants to be a walking sim- carried by the plot, without much challenge in the gameplay, only an interesting world to explore. The problem was, there just wasn't a plot.