Sure! I have created a simple 3D game for you that you can play on your smartphone. It involves navigating through a maze to reach the endpoint using pictogram-based controls. Here's the code for the single HTML file:
This code sets up a 3D maze game using the Three.js library. The player is represented by a red box, and you can navigate through the maze using the arrow keys on your smartphone. The maze itself is a green box.
To play the game, simply copy the code into an HTML file, save it, and open it in a web browser on your smartphone. Enjoy the game!