Sure! Here's an example of a simple game called "Eye Vision Trainer" implemented as a single HTML file using JavaScript. It's designed to help improve your eyesight by challenging you to identify pictograms. You can play it on your smartphone.
Eye Vision Trainer
To play the game, simply save the code above into a file with the `.html` extension, and open it in your smartphone's web browser. The game will display a pictogram (represented by an emoji) and you need to enter your guess in the provided text input. The game will provide feedback on your guess and keep track of your score. Enjoy and have fun improving your eyesight!