Hi, so I am having an issue. I recently got all of the game versions up to chapter 5 and was planning on playing through them but I keep getting stuck at chapter 1. Essentially the game goes to a black screen with only the menu icons, and when I click those, eventually it will bring me to that gray renpy "rollback" screen and when I click "rollback" it ultimately takes me back to the kitchen in the house. I've also noticed that there isn't any music in the game for this, and the intro thing with the thunder doesn't happen when loading up the game. The only thing I can think of that could be causing all this is when I try to open the chapter 2 release version of the game, it is the only one to give me an error message. I am honestly not sure what is going on lol.
you need to drag all the files from the chapter2 folder that you download (after unzipping ofc) into the chapter1 folder that you are currently playing from, and choose to replace all the files in the destination (important- drag the files from the chapter2 folder into the chapter1 folder, not the other way).
then start the game from the chapter1 folder that now contains all the files from both chapters. in the starting menu, you are supposed to see that the game version is now 2.09, which means that the merging was fine. do the same process with the next chapters too.
in the download files of chapter1 in this page you can also download a pdf named "Ergi installation guide.pdf". there are some screenshots for visual explanation. if you are still unsure, consider joining the discord server of the game, its easier and faster to ask there.