Sure! Here's a simple implementation of a game that meets your requirements. It's a basic version of a sandbox game with portal gun features. Please note that due to the constraints of text-based communication, this implementation won't include actual graphics or pictograms. It's a simplified representation with ASCII characters.
To play the game, copy the code below and save it as an HTML file. Then open the file in a web browser on your smartphone. You can use the WASD keys to move and the spacebar to place a portal. Enjoy!
Feel free to modify and enhance this code to add additional features and improve the graphics as per your requirements and preferences.