its great that you were able to actually play it.
As for the story itself, at its core its just the Protagonist remembering talking to their friend. i am not sure how much progress you actually made but there are around 30 memories. Some of them are hidden away and can only be found through a bit of exploration. If you do feel like you cant find anymore then try walking into the void a few times, you would reach the End of the game where you would be allowed to make a choice.
Thanks again for playing though.