Sure! Here's an example of a simple cleaning game implemented as a single HTML file using JavaScript and enclosed in script tags:
When you open this HTML file in a web browser on your smartphone, you will see a canvas element representing the game area. The player's objective is to click on the moving cleaning task (represented by a blue square) to accumulate points. The score is displayed on the top left corner of the canvas.
You can click anywhere on the canvas to start the game and then proceed to collect points by clicking on the moving cleaning task. The task's position will change randomly within the canvas area to increase difficulty.