Sure! Here's a simple cat platformer game implemented as a single HTML file using JavaScript:
In this game, you control a cat character using the arrow keys on your smartphone's keyboard (assuming it has one). The objective is to navigate the cat to land on the platforms by jumping. The cat falls down due to gravity and you can make it jump by pressing the up arrow key. The cat will collide with the platforms and land on them.
Note: Make sure to replace `'emozi_all/cat.png'` in the CSS section with the correct path to your cat image file.