Sure, here is a simple implementation of a 2D side-scrolling platformer game where you can jump on blue platforms using pictograms:
To play the game, open the HTML file in a web browser, and you can control the player by pressing the "Arrow Up" key to jump on the blue platforms. The red square represents the player, and the blue platforms are the ones you need to jump on. The game will run in a loop until you close the browser window.