"Create a simple, addictive endless runner web game inspired by the T-Rex Dinosaur game from Google Chrome. The player controls a dinosaur character that runs automatically across a desert landscape and must jump over obstacles like cacti and duck under birds. Use pixel-style graphics with a monochrome (black and white) aesthetic. The game should increase in speed over time to add difficulty. Include a score counter that tracks how far the player has run. Build the game using HTML, CSS, and JavaScript, ensuring it is lightweight and runs smoothly even offline."