Sure, here's a simple game implemented as a single HTML file using JavaScript, enclosed in script tags. The game involves tapping on pictograms displayed on the screen. You can play it on a smartphone. Give it a try!
Pictogram Tapper Game
To play the game, simply open the HTML file in a web browser on your smartphone and start tapping on the pictograms displayed on the canvas. The objective is to score as many points as possible within the given time limit. Once the time is up, a game over message will be shown with your final score. Enjoy!