Sure! Here's a simple game implemented as a single HTML file with JavaScript. It is designed to be played on a smartphone and uses pictograms to represent the game elements. The game is called "Fruit Matcher".
To play the game, simply copy the above code into a new HTML file, save it with a `.html` extension, and open the file in a web browser (preferably on a smartphone). You will see a grid of cards with fruit pictograms on them. Tap on two cards to flip them and try to match the pairs. When you successfully match a pair, the cards will turn green; otherwise, they will flip back over. The objective is to match all the pairs to win the game!
Please note that this is a basic game implementation and can be enhanced further based on your specific requirements.