Sure! Here's a basic implementation of a sandbox game with portal gun features using JavaScript, HTML, and pictograms:
To play the game, open a text editor, save the code as a `.html` file, and open it in a web browser. You can control the player using the WASD keys to move and the Spacebar to place a portal. The portal gun will be represented by a yellow square, and you can place up to two portals in green and blue. When the player collides with a portal, they will be teleported to the corresponding destination portal.
Note: This is a basic implementation to get you started. Feel free to enhance and customize the game further based on your requirements and preferences.