Sure! Here's an example of a basic game implementation using HTML and JavaScript:
Welcome! Please choose 1 or 3 to proceed.
This is a simplified version of the game where you start at a "start" state and can choose either 1 or 3. Choosing 1 increases your power, while choosing 3 triggers the RPG game. The logic for other game states like "area1" and "rpg" can be added to the processInput function as per your game requirements.
Please note that this is just a starting point, and you can expand on it based on your specific game design and requirements.