Sure, here's an example of a simple Minecraft 2D game implemented as a single HTML file using JavaScript and enclosed in `` tags:
<br><br>
<br>
<style>
canvas {
border: 1px solid black;
}
</style>
<canvas id="gameCanvas" width="480" height="320"></canvas>
In this simple game, you control a green square (representing the player) using arrow keys. The player character moves in increments of the block size (20 pixels) on the canvas. Feel free to modify and enhance the game according to your preferences.