Sure, here's a simple horror game implemented as a single HTML file with JavaScript. It's designed for smartphone operation and uses pictograms to enhance the horror atmosphere. Please note that this is a simple example and can be further expanded and improved as needed.
Horror Game
In this example, the game starts with a "Start" pictogram, the player taps on it to start the game. Then, a "Door" pictogram appears, and the player taps on it to open the door. However, when the door is opened, the game ends and a "Game Over" message is displayed.
You can replace the `url('emozi_bear.png')` and `url('emozi_all/door.png')` with the actual image file paths you want to use for the pictograms. Remember to place the images in the same directory as the HTML file.
Feel free to modify and expand upon this simple game to make it more thrilling and engaging!