Sure, I can help you create a simple game implementation in a single HTML file using JavaScript. Here's an example of a game where the player needs to guess a pictogram representing an animal. It will run on smartphones and uses only ASCII art for pictograms. Please note that this is a basic example and can be expanded upon as needed.
Animal Pictogram Guessing Game
To play the game, open the HTML file in a web browser on a smartphone. It will display a pictogram representing an animal, and the player needs to guess the animal and enter their answer in the provided text input. After clicking the submit button, the game will display a message indicating if the guess was correct or not. The game will then restart with a new random animal pictogram to guess.
Feel free to modify and expand upon this basic example to suit your needs.