I liked this short spanish Ectocomp game entered in the '4 hours or less' part of the competition; it's brief, but longer than you'd think for a game made in 4 hours. It is in visual novel style, with some white-on-black lineart and relatively few, but impactful, choices.
In my playthrough, I had 5 days to live after I crash-landed on a planet, since oxygen was running out. The main theme was discovering nature on the planet, both good and bad, and deciding to interact with it positively or negatively.
I never felt super invested in the stakes, but I thought the game was charming and glad I played it, and since it doesn't take long I think people should check it out.