Sure! Below is a simplified implementation of the classic game Tetris, written in a single HTML file using JavaScript. The game is playable and optimized for smartphone operation. I have used icons as pictograms to represent the different Tetris shapes. Note that this is a basic version and can be expanded upon further.
Tetris
To play the game, simply copy and paste the above code into a new HTML file and open it in a web browser on your smartphone. You can use the arrow keys to control the Tetris shapes and try to clear rows to score points. Enjoy playing Tetris on your smartphone!