Sure! Here's a simple game implemented as a single HTML file with JavaScript. The game features a green square that watches the user's actions. If the user touches the green square while it's watching, a message saying "Why did you touch that?" will be displayed. If the user moves the green square while it's watching, a message saying "Woah, you have super powers? That's cool!" will be displayed.
To play the game, simply open the HTML file in a web browser on your smartphone. You will see a canvas with a green square. Touching the square will trigger the corresponding messages based on the game rules mentioned earlier.