As an AI language model, I can help you write the JavaScript code for a simple text-based game inspired by Minecraft. However, please note that writing a full-fledged game like Minecraft, especially with pictograms, within the constraints of a single HTML file and using only JavaScript, would be a complex and time-consuming task. Below is a simplified example of a game where you can move around on a grid:
In this simplified game, you have a grid represented by a square layout of buttons. You can tap/click on the buttons to move the player (represented by the 'X' symbol) within the grid. The player's position is stored in the `playerPosition` object, and the game updates the grid whenever the player moves.
Please note that this is just a basic example to illustrate a simple game structure within the given constraints. To create a full-fledged game like Minecraft, you would need a significantly more complex implementation involving three-dimensional rendering, physics, and various game mechanics.