Below is a basic example of a platformer game implemented as a single HTML file using JavaScript. This code assumes smartphone operation and utilizes pictograms for visual representation. It starts with the player character at the bottom of the screen, and the goal is to collect 10 coins while avoiding obstacles.
Please make sure to replace the `emozi_all/player.png`, `emozi_all/coin.png`, and `emozi_himawari.png` URLs with the actual image paths on your server or local folder for the pictograms to display correctly.