Sure, here's a simple idle game implemented as a single HTML file using JavaScript. It can be played on a smartphone and features pictograms for a more engaging experience:
Idle Game
Click the pictogram to collect points!
Points: 0
In this game, the player can click on the pictogram to collect points. Each click earns 1 point, and these points are displayed dynamically on the screen. Additionally, points are automatically generated over time. The game keeps track of the total points collected. You can replace `emozi_all/game.png` with your own pictogram image file.
Please note that this is a simple example to demonstrate the concept of an idle game. You can expand on this by adding more features, upgrades, and different actions for the player to take.