As an AI, I can assist you in creating a simple game using JavaScript enclosed in script tags within a single HTML file. Here's an example implementation of a basic guessing game:
In this game, the player is required to guess a number between 1 and 10. The program will generate a random number between this range, and the player will input their guess through a prompt. After the player submits their guess, an alert will display indicating if their guess was correct or not. The correct number is also revealed if the guess is incorrect.
You can copy and save the above code into an HTML file (e.g., `game.html`) and open it in a web browser on your smartphone to play the game. Note that this is a simple example, and you can customize and enhance it further based on your preferences and requirements.