Sure! Here's an example of a simple Tetris game implemented as a single HTML file using JavaScript:
In this implementation, the game is played using the keyboard arrow keys to move the tetromino and the up arrow key to rotate it. The goal is to clear as many lines as possible by filling complete rows with tetromino blocks. Once a row is filled completely, it will be cleared, and the remaining blocks will shift down. If the blocks reach the top of the grid, the game is over.
Note: This is a simplified version of Tetris and can be further expanded and improved based on specific requirements and design preferences.