Alright! Here's an example of a simple game implemented as a single HTML file using JavaScript. In this game, you are a spaceship trying to avoid asteroids. It's designed for smartphone operation and includes pictograms for a fun visual experience.
This game features a spaceship controlled by touch gestures to avoid asteroids. You can play it by opening the HTML file on your smartphone, and touching the left half of the screen to move the ship left, or the right half of the screen to move the ship right. The game will end if the ship collides with any of the asteroids. Have fun!