Sure! Here's a simple game that you can play on a smartphone using pictograms. This game includes a "Rickroll DLC" surprise. Just copy the code below and save it as an HTML file on your smartphone to play the game.
Game 4: Rickroll DLC
To play the game, open the HTML file in a web browser on your smartphone. You will see a game with a pictogram displayed in the center. Each time you tap on the pictogram, your score will increase by 1. The game will continue until you tap on the pictogram during the "Rickroll DLC" surprise, and the game over message will be displayed. Enjoy the game!