Sure! Here's an example of a simple game where the player uses a pistol to survive from zombies. The game will have basic controls for smartphone operation, and I will use pictograms to represent the game elements. Please note that this is a simple implementation for demonstration purposes.
To play the game, open the HTML file in a web browser on your smartphone. The player can move the character using the arrow keys on the on-screen keyboard and shoot zombies by tapping the screen. The game will keep track of the player's ammo count and display it on the screen. If the player collides with a zombie, they lose and the game ends. Note that this is a basic implementation and can be further enhanced with additional features, graphics, and gameplay mechanics.