As an language model AI, I can provide you with a simplified example of a simple GTA-styled game that can be played on a smartphone. Please note that this is a very basic implementation and may not fully resemble the complexity and features of the actual GTA game.
Here's an example implementation:
In this basic implementation, there is a canvas element representing the game area. The player's character is represented by a red circle, which can be controlled using the arrow keys on the smartphone's keyboard. The game loop constantly updates the canvas and redraws the player's character to give the illusion of movement.
Please note that this is just a simple example to give you an idea of how a GTA-styled game can be implemented using HTML, JavaScript, and a single HTML file. A fully-fledged game like GTA would require more advanced game development techniques, frameworks, and assets, which are beyond the scope of this example.