Sure! Here's an example of a simple game implemented as a single HTML file using JavaScript code enclosed in script tags. The game is a basic "Tap the Venomous Snakes" game designed for smartphone operation, using pictograms. The objective is to tap on the venomous snakes as they appear on the screen. See the code below:
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To play the game, simply open the HTML file on your smartphone's web browser. The game will start automatically, and venomous snakes (represented by snake pictograms) will appear on the screen every second. Tap on the snakes to eliminate them and increase your score. If you miss tapping a snake or if the snakes overwhelm the screen, the game will end and display your final score. You can then restart the game by tapping the OK button in the game over alert message.
Feel free to customize and enhance this simple game according to your preferences!