Sure! Here's a simple text-based version of the game Undertale implemented as a single HTML file:
Undertale Game
Welcome to the Undertale Game!
Click on the pictograms to make choices and progress through the game.
Please note that the above code assumes you have `emozi_bear.png`, `emozi_chicken.png`, and `emozi_rabbit.png` image files in the same directory as the HTML file representing the pictograms. You can replace them with any appropriate pictogram images for your game.