Sure, here's a simple game that meets your requirements. It's a target shooting game where you need to hit the target using a gun that shoots poop pictograms. The game can be played on a smartphone.
To play, tap on the screen to shoot the poop pictogram and try to hit the target. Each successful hit earns you a point. You can aim and shoot multiple times to score as many points as possible within a fixed time limit.
To try the game, copy the entire code and paste it into a text editor, then save the file with a `.html` extension. Open the saved HTML file in your web browser, and the game will start automatically.