Sure! Here's an example of a simple game called "Sink Ships!" implemented as a single HTML file using JavaScript, enclosed in script tags:
Sink Ships!
In this game, there is a large red circle representing the ship in the blue water. You can tap on the ship, and it will sink further down in the water. Once it reaches the bottom of the water (sinks completely), an alert message will be shown to inform the player. This game can be played on a smartphone.
Note: This is just a basic implementation to demonstrate the concept. You can enhance the game further by adding multiple ships, keeping score, and adding visual effects.