Sure! Here's an example of a simple 2D game where you can kill enemies using JavaScript and pictograms. It is designed to be played on a smartphone.
In this game, you control a blue player icon at the bottom of the screen. An enemy icon represented by a red square appears at random positions at the top. Your goal is to tap/click on the enemy icon to "kill" it. Once you successfully kill an enemy, the game will reset with a new enemy appearing after a short delay.
Note: This is a basic example to give you an idea of how the game mechanics work. You can customize and enhance it further based on your requirements.