Sure! Here's a simple game implemented as a single HTML file using JavaScript. The game involves collecting dirt by tapping on the screen. It's optimized for smartphone operation and uses pictograms.
pig oink
steve head
In this game, a dirt pictogram is shown on the screen, and you can tap on it to collect dirt. The dirt count is displayed at the top of the screen and updates automatically whenever you collect dirt. By default, the dirt generation is not implemented as per the provided statement, but you can manually increment the dirt count to simulate dirt generation over time. Feel free to modify the game as needed!