Sure! Here's a single HTML file game called "Red Emoji Dungeon Obby." It utilizes JavaScript and emoji pictograms for a smartphone gaming experience. Simply save the following code into an HTML file and open it in a web browser to play the game:
To play the game, simply use the left and right arrow keys to move the scared emoji character. Avoid falling into the red emoji lava by navigating on the red emoji platforms. If the character touches the lava, a "Game Over!" message will be logged in the browser's console.