Sure! Here's an example of a game called "Merge Jewel" implemented as a single HTML file using JavaScript. The game is designed for smartphone operation and uses pictograms to represent different jewels.
In this game, you'll see a 4x4 grid of jewel pictograms (diamond, emerald, ruby, sapphire) on your smartphone screen. You can merge two adjacent jewels of the same type by tapping on them. When merging two jewels, the score will increase by one, and the merged jewels will disappear. The objective is to get the highest score possible by strategically merging the jewels on the grid.