Sure! Here's a simple implementation of a 2D top-down shooter game where the player, represented as a dinosaur, has to shoot away meteors using pixel art. This implementation is designed to work on smartphones.
To play the game, you can copy the above code and save it as an HTML file (e.g., `dino_shooter.html`). Then, open the HTML file on your smartphone using any browser that supports JavaScript. The player can control the dinosaur using the arrow keys or by tapping the sides of the screen if using a touch interface. The objective is to shoot away the falling meteors by moving the dinosaur left or right. If a meteor hits the dinosaur, the game will end and display a "Game Over" message.