Sure! Here's an example of a simple 3D Minecraft game implemented as a single HTML file using JavaScript. The game allows you to mine blocks, move around using a joystick, and build new blocks using a button. The game interface is optimized for smartphone operation and utilizes pictograms where possible:
Please note that this is a simplified implementation and may not have the full functionality or features of a complete Minecraft game. However, it should give you a starting point to build upon and expand according to your requirements.