Sure, here's an example of a simple game where a girl is being chased by a monster. The game will be played on a smartphone and will use pictograms for visuals. The goal of the game is for the player to navigate the girl away from the chasing monster using touch or swipe gestures.
You can save the above code in a single HTML file and open it in any browser on your smartphone to play the game. The girl will be represented by a pink rectangle, and the monster will be represented by a green rectangle. Swipe left or right to move the girl horizontally, and swipe up or down to move her vertically. The goal is to avoid the monster by not getting caught by it. If the girl and the monster collide, a "Game Over" alert will be displayed. Have fun playing the game!