Sure! Here's an example of a simple Tetris game implemented as a single HTML file using JavaScript:
To play the game, open the HTML file in a web browser (preferably on a smartphone for optimal experience). Use the arrow keys to control the blocks: up arrow to rotate, down arrow to move down, left arrow to move left, and right arrow to move right. The goal of the game is to fill and clear rows by arranging the falling blocks in a way that forms complete horizontal lines without any gaps.
Note: This implementation is a simplified version of Tetris and might not include all the features or mechanics found in a full-fledged Tetris game.