Nice idea but the game is too hard, I always lose on day 1. Maybe you could have made it so you can get back to the hut when the sandstorm happens even without the supplies, and have to go out again when it ends.
I like the sprite of the character. Your tilesets could look more natural if you design tiles where you mix both types of sands, to be used between those two types of sands as a transition.
Btw If you participate to the next GWJ I can play your next game on stream (https://www.twitch.tv/videos/878547511)