Sure! Here's a simple implementation of Tetris in a single HTML file using JavaScript and pictograms:
Tetris
To play the game, simply open the HTML file in a web browser (on a smartphone or desktop) and use the left, right, up, and down arrow keys to control the tetromino pieces. The goal is to complete rows by filling them with tetromino pieces. Once a row is completed, it will be removed, and the player will earn points. The game ends when a new tetromino piece can no longer fit on the game board.