Sure! Here's an example of an idle game implemented as a single HTML file with JavaScript, using pictograms for a smartphone operation:
Idle Game
Resources:
Click the buttons to gather:
In this example, the game is a simple idle game where the player can gather three different types of resources by clicking the corresponding buttons. The resources are displayed using pictograms, and their counts are updated in real-time. Additionally, the game automatically generates resources every 5 seconds.