Here is a simple game implemented in a single html file using JavaScript:
This code sets up a simple idle destruction game where the player is represented as a blue square. The player's score increases over time and is displayed on the screen. The game loop function updates and renders the player and score continuously.
You can further expand this game by adding more features such as obstacles, enemies, power-ups, and interactivity. Feel free to modify and improve the game based on your preferences.