Hello Friend. I'm going straight to your question: Every day is a separate and independent update. Right now I've done things that way because of the size of the files. Each update is approximately 1GB. As you can see, my game is a little more specific:) ... and because of that, if someone didn't like the game, they could only download day 1 without downloading the entire 3GB.
I am currently working hard on Day 4, with the update itself being smaller and stacked on Day 3. Shortly after, I will try to put the whole “The beginning” into one file as a finished product.
Thanks for the interest in my game ;)