Sure! Here's an example of a simple game written in JavaScript, enclosed in script tags within a single HTML file, that you can play on a smartphone. I'll assume you want to implement a car racing game using pictograms.
Car Racing Game
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In this game, you control a car using the left and right arrow keys. The car moves horizontally on the screen, avoiding the red obstacles falling from the top. If the car collides with an obstacle, the game ends and your score is displayed. The game will keep going until you collide with an obstacle.