Sure! Here's a simple example of a blocky 3D game implemented as a single HTML file, using JavaScript and enclosed in script tags. The game allows the player to move a character within a 3D grid using a smartphone interface:
In this game, a red block represents the character, and the player can control its movement by tilting their smartphone. The `beta` and `gamma` angles from the device's orientation are used to update the character's position within the 3D grid. The character moves faster or slower based on the scale factor applied.
Please note that the game logic in this example is very basic, and further enhancements can be made to create a more complex and engaging blocky 3D game.