Sure! Here's a simplified example of a side-scrolling turn-based fantasy RPG implemented in a single HTML file using JavaScript:
This code sets up a basic game structure with a canvas element for rendering the game world. It includes a player character, enemy characters, and the ability to move the player left and right. The game loop runs at 60 frames per second and continuously updates and redraws the game objects on the canvas.
Note that this is just a simple example to illustrate the concept of a side-scrolling turn-based fantasy RPG. You can expand and customize the game logic, add animations, levels, abilities, and more to create a fully-fledged game.