It means that the game dialogues have reached an endpoint. I'll fix it on the next version. Thanks for letting me know.
That's pretty common for Godot games (you can read here: https://github.com/godotengine/godot/issues/45563). For now, you can add an exception on your antivirus to let you run the game. If you are still unsure, you can use https://github.com/GDRETools/gdsdecomp to decompile the game files and look at them yourself.
From that description it sounds like GPU Driver issue. I'm updating the game to fix it in a few hours.
