Sure! Here's an example of a simple knockdown game implemented as a single HTML file using JavaScript. It is designed for smartphone operation and uses pictograms for a visual interface.
In this game, players need to tap/click on the screen to throw the ball towards the target. The ball starts at a certain position and animates towards the target. Once the ball reaches the target, the game resets and players can play again by tapping/clicking on the screen.
Please note that you need to provide actual PNG images (with corresponding file names: `emozi_bear.png` and `emozi_all/ball.png`) for the pictograms used in the game.