Sure! Here's a simple JavaScript game called "War of the Toilet and Happy Emoji" that can be played in a web browser, specifically designed for smartphone operation. It involves two characters, a toilet and a happy emoji, battling against each other. Pictograms will be used to represent the characters. Please note that the actual game logic and design can be further enhanced based on your requirements and preferences.
To play the game on a smartphone, simply open the HTML file in a web browser that supports JavaScript. The game canvas will be displayed, and you can control the toilet character using the arrow keys on your smartphone keyboard. The happy emoji character will move randomly. The objective of the game can be defined based on your preferences, such as capturing the emoji or avoiding collisions.