Sure! Here's a simple text-based game called "Galactic Run" implemented as a single HTML file with JavaScript enclosed in script tags. The game can be played on a smartphone and uses text instead of pictograms.
Galactic Run - Text-based Game
Welcome to Galactic Run! Your mission is to navigate through the treacherous galaxy and avoid obstacles.
To play the game, simply copy the above code into a new HTML file and open it in a web browser on your smartphone. You'll see instructions and options to navigate through the galaxy. Try to reach the end without hitting any obstacles!