Sure, here's an example of a simple Animoji battling emoji game implemented as a single HTML file using JavaScript:
In this game, you control the animoji character by touching the screen and dragging it around. The objective is to hit the emoji character as many times as possible. You can add your own pictogram images (animoji.png and emoji.png) to the same directory as the HTML file. The game keeps track of the number of hits in the console.
Please note that this is a simple example and can be expanded upon to add more features and gameplay elements according to your requirements.