Sure! Here's an example of a simple platformer battle game using JavaScript and emoji icons. The game uses keyboard inputs for smartphone operation.
This code will create a canvas element where you can control a player character (🥊) using the arrow keys or jump using the spacebar. An enemy character (👾) moves from right to left, and if there is a collision, the enemy will reset to a random position.
Please note that this is just a basic example to get you started. You can further expand and customize the game mechanics, visuals, and features according to your requirements.