Sure! Here's an example of a simple single player dungeon crawler game implemented as a single HTML file using JavaScript. It is optimized for smartphone operation and utilizes pictograms for visuals. Just copy the code below and save it as an HTML file to play the game:
This code sets up a simple dungeon layout using pictograms and allows the player to move within the dungeon using arrow keys. The player is represented by the "
🤖" pictogram and can move through empty cells represented by "⬜️" while avoiding walls represented by "⬛️". The game is displayed and controlled within the HTML file itself.