Sure, I can provide you with a simple platformer game implemented as a single HTML file. Here is an example of a minimalistic platformer game using JavaScript and pictograms:
This simple platformer game allows the player to control a red square using the left and right arrow keys, and jump using the spacebar. The blue rectangles represent the platforms that the player can stand on. The player is affected by gravity and collides with the platforms to simulate a basic platformer game. Feel free to modify and enhance the game according to your needs.