You are probably familiar with the chrome dino game, and you have probably asked what happens at the end of the game. I will answer it for you.
What is the max score in the chrome dino game?
The answer is 999999
How did I find out?
I override the gameOver function so when the game calls it noting happens and set the speed to a high value
Runner.instance_.gameOver = ()=>{}
Runner.instance_.currentSpeed = 100000
When you reach the 999999, sadly the counter restarts, nothing happened. š
You can try this at chrome://dino/