Sure, here's a simple HTML file that implements the "Crabs vs Stones" game using JavaScript:
To play the game, open the HTML file in a browser or copy the code into a new HTML file and open it. The game can be played on a smartphone by dragging your finger horizontally to move the blue player and avoid the falling red stones. If a stone hits the player, an alert will be shown indicating that the game is over, and the game can be restarted by reloading the page.