Rock falls, everyone dies is comedic LitRPG. It’s quite fun and due to it being only about 200 pages long, it’s perfect if you want a short break, for example if you just read a over 2000 page web novel. It can be read in one sitting with ease. The story has a lot of turnarounds and never gets repetitive. If you have a bit of time, just read it. It’s complete and brief so you don’t have to worry about finishing it and can just enjoy.