I understand that you would like me to create a game that can be played as a single HTML file and must include JavaScript. The JavaScript code should be enclosed within script tags and should execute immediately. The game should be designed for mobile devices, and if possible, make use of emojis. If not possible, any game that can be created would suffice.
Based on your request, I will create a simplified version of the classic game "Mario World" using emojis. Here is the code for the game:
Mario World
Use the arrow keys to control Mario.
In this simplified Mario World game, you can use the left and right arrow keys to control Mario, represented by the emoji character. The character will move 10 pixels to the left or right depending on the pressed arrow key.
Please note that due to the limitations of text-based emojis, the visualization of the game may not be as complete as in a graphical game. However, the gameplay functionality should still be present.
I hope this meets your requirements. If you have any further questions or requests, please let me know.