Sure! Here's a simple example of a game implemented as a single HTML file using JavaScript. It's a memory game where you have to match pairs of pictograms by flipping two cards at a time. It's designed to be played on a smartphone.
To play the game, you can copy and paste the above code into a single HTML file, save it with a `.html` extension, and open it in a web browser on your smartphone. The game will be displayed, and you can tap on the cards to flip them and try to find matching pairs of pictograms. The game will alert you when you've successfully matched all the cards.
I hope you enjoy playing the game! Let me know if you need any further assistance.