Sure, here's an example of a game where you control a big bouncing sad face using smartphone operation, while trying to catch 50 small bouncing happy faces:
In this game, a big bouncing sad face (red color) will move according to your mouse position on the smartphone screen. The objective is to catch 50 small bouncing happy faces (green color) by touching them with the big face. The faces will bounce around the screen and change direction when they hit the edges.
Note: This code will work when saved as a standalone HTML file and opened in a web browser.