Sure! Here's a simple game that meets your requirements:
Code Hunt Game
Assuming smartphone operation. Use pictograms if possible.
To make this game work, you should create an "images" folder in the same directory as your HTML file and place the following images in it: smartphone.png, shovel.png, door_locked.png, vault_locked.png, and code.png.
When you open the HTML file in a web browser, you'll see a game screen with a smartphone image at first. You need to find a shovel to dig up the phone. Click on the shovel image to remove it and reveal a locked door. You then need to find the key to unlock the door. Click on the door image to remove it and reveal a locked vault. Finally, click on the vault image to remove it and reveal the code. Once you find the code, the game will congratulate you.
Please note that due to the limitations of the conversational format, the actual gameplay experience may vary. I hope you find this implementation helpful!