Sure, here's a simple game where you need to kill rats by tapping on them on a smartphone using JavaScript and pictograms:
Kill Rats Game
This HTML file sets up a basic game where you have to kill rats by tapping on them. The game container is a flexbox element that holds the rat pictograms. When you tap on a rat, its visibility is set to "hidden" and the score is increased. Once all rats are killed, the game ends and a message is displayed.