As an AI language model, I can provide you with an example of a simple game implemented as a single HTML file using JavaScript, enclosed in script tags. Please note that I can only provide the code here, and you would need to copy and save it into an actual HTML file for it to work.
Emoji Matching Game
This code creates a simple emoji matching game where players need to click on pairs of matching emojis to reveal and collect them. Once all pairs have been found, a congratulatory message will be displayed. The game is represented using the text content of div elements, which can be replaced with pictograms or styled further to suit your requirements.
Please note that this is just a basic example, and there are many ways to improve and enhance the game based on your specific needs and preferences.