As an AI language model, I can provide you with a template for a simple game in JavaScript that can be implemented as a single HTML file. Here's an example:
Simple Game
Score: 0
This is a simple game where the player clicks on a target (represented by the
🎯 pictogram) to increase their score. The target randomly moves within the game area, and each successful click increments the score. The current score is displayed on the page.
You can copy and paste this code into a single HTML file and open it in a web browser to play the game. Please note that this is a basic example, and you can modify it according to your specific requirements or add more features to make it more complex.