This was incredible!!
I really love how rich the world is and that you can even interact with little things, enter houses, go up a lookout post, look at ducks in a pond and then swim. The time running out signalized by the world disappearing before your eyes is also a great idea.
There is something grimly funny and beautiful about making your way to a ligthhouse your whole journey, just for it to lose texture and disappear right before you get to it. Then, you can only watch the world end, because your journey is over.