Sure! Here's an example of an incremental game implemented as a single HTML file using JavaScript and enclosed in script tags. The game is designed for smartphone operation and uses pictograms for a better visual experience.
Disclaimer: This is a simple demonstration and may not include all features you would expect in a complete incremental game.
Score: 0
Click Me
Buy Upgrade
In this incremental game, the player can click on the "Click Me" button to increase their score. They can use the accumulated score to purchase upgrades which increase the score per click. The upgrade cost increases with each purchase. The player's current score is displayed using the pictogram of coins.