Sure! Here's an example of a simple coloring game based on the popular game "Friday Night Funkin'" (FNF). The game allows you to color different characters from the game using a smartphone interface. It is implemented as a single HTML file, enclosed in script tags, and written in JavaScript.
FNF Coloring
To play the game, simply open the HTML file in a web browser on your smartphone. You will see a canvas with a set of color buttons below it. Select a color by tapping on one of the color buttons, and then start coloring the canvas by tapping or dragging your finger across the canvas area. The game allows you to create your own colorful versions of the FNF characters.
Note: This is just a basic example to get you started. You can customize and add more features to enhance the game further.