Sure! Here's a simple game implemented as a single HTML file using JavaScript:
Harshil's Game
This game creates a canvas element and a player object that is represented as a blue square. The player's position and size are stored in the `player` object, and the `drawPlayer` function is used to draw the player on the canvas. The `update` function is responsible for updating the game state and drawing the player in each frame. It uses `requestAnimationFrame` to create a game loop and continuously update the game. Currently, the game does not have any specific gameplay mechanics, but you can add more functionality and interactivity as per your requirements.