Sure! Here's an example of a historical story game where you start as a caveman and progress through different eras:
In this game, when you open the HTML file on a smartphone, you will be greeted with an alert message that sets up the caveman era and provides a brief introduction. As you progress through the game, you can call the `game.nextEra()` function to advance to the next era, updating the current era and displaying a new story using `game.currentStory`.
You can add more interactive elements, images, or gameplay mechanics to the code based on your requirements and design preferences.