Create a physics-based Tetris game using HTML, CSS, and JavaScript with the Matter.js physics engine. Requirements: - Use Matter.js to simulate gravity and collision for Tetris blocks. - Render blocks on an HTML5 canvas. - Blocks should be composed of rectangles grouped into Tetris shapes (I, J, L, O, S, T, Z). - When new blocks spawn, they fall under gravity and collide naturally with other blocks. - Allow user to control the falling block with buttons on screen, for phones. - Do not use grid-based logic — rely entirely on physics. - Add a static floor and walls to keep the blocks inside the play area. - When blocks stack up beyond the top of the screen, display "Game Over". - Use minimal CSS, focus on JavaScript and physics simulation.