Sure! Here's a basic implementation of a 3D shooting game with zombies using HTML, JavaScript, and pictograms. The game is designed for smartphone operation and is contained in a single HTML file. You can copy and paste the code below into a file with a .html extension and open it in a web browser to play the game.
In this game, you play as a blue square (representing the player) and have to shoot down green squares (representing zombies) using red squares (representing bullets). The player is controlled by touch input, and the game objective is to survive as long as possible without colliding with any zombies.
Note that this is a basic implementation and can be expanded upon with additional features, such as scoring, levels, power-ups, and more.