Sure, I can help you create a simple game using JavaScript and HTML. Below is an example of a game called "Guess the Pictogram" that can be played on a smartphone:
To play the game, simply open the HTML file on a smartphone (using a mobile browser) and a random pictogram will be displayed. The player needs to enter their guess for which pictogram is shown. If the guess is correct, a message will congratulate them. If the guess is incorrect, a message will show the correct pictogram.
Feel free to modify the pictograms array with more options to include your preferred icons.