Sure! Here's an example of a simple game implemented as a single HTML file using JavaScript, enclose within script tags. This game can be played on a smartphone and uses pictograms to represent the hero and enemy powers.
Superhero Game
Tap/click on the hero or enemy to attack!
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In this example, we have a simple interface with two pictogram representations; the hero and the enemy. When you tap/click on either the hero or enemy, it triggers an attack. The respective power level (damage) is displayed in the browser console.
Please note that this is just a basic example to demonstrate the concept of a game. You can extend this further by adding more features, levels, health points, win/loss conditions, etc., based on your requirements.