whotterre/chrome_dino ? reverse-engineered prompt

Build me a simple Chrome Dino style game that runs in the browser and looks and feels like the offline dinosaur runner.

I want the player to control the little dino with jump and maybe crouch if that fits, with obstacles coming in from the right and the game getting harder over time. Please use plain JavaScript and the canvas so everything is drawn on screen, and make it feel smooth and responsive. Include a score, a game over state, and a way to restart quickly after losing.

Keep the look clean and close to the original Chrome game, with simple shapes and basic animations rather than fancy art. If it helps, organize the code in a way that keeps the game logic, drawing, and character or obstacle behavior easy to follow. If you need to look up current canvas best practices or a small detail online, go ahead.