Sure, here's a simple game where you can karate chop objects using pictograms as a representation. Since you mentioned smartphone operation, I'll make it responsive to touch gestures.
🥋
This HTML file contains a simple game where you can karate chop an object represented by the
🥋 pictogram. When you touch/click on the game area, the object will be temporarily replaced with a
💥 pictogram to indicate the karate chop action. After a short delay (500 milliseconds), it will revert back to the original
🥋 pictogram.
You can save this content in a single HTML file and open it in a web browser. You can then play the game by tapping/clicking on the game area to perform karate chops!