Sure! Here's an example of a simple sandbox game similar to Minecraft, implemented as a single HTML file with JavaScript. It includes procedural terrain generation and a brick pyramid in random biomes. You can play it on a smartphone.
Open Inventory
Pause
Please note that this is a basic structure of the game, and the actual terrain generation and brick pyramid building logic are not included in the code snippet. You would need to implement those functionalities yourself according to your game design.