First off, I applaud you for doing a survival game in only a week. I feel like it's a type of game that's extremely hard to balance in a short time frame. In terms of your game, I like the stress of having something difficult/scary on the horizon and spending time to prepare for it. That definitely came across. Unfortunately I was able to beat the game with something like 280 food, and a bunch of other resources that I never used for anything. (Can the resources other than food be used for anything? Sorry if I missed it)
Most of the difficulty came from getting the tasks done quickly so I wouldn't have to stress about them (I assume you lose the game if you don't do the daily tasks before the end of the day, but I wouldn't know I got them each time). After the task were done I would just sort of wander about the island picking up sticks and cool rocks without an understanding of what I could use them for.
So as a basis for an expanded/more fleshed out game, and for a game jam, fantastic. Great job. But I didn't have any fun while playing it, sorry to say. But also good job at sticking to the theme. Cheers!