What's the difference between a guitar and a fish? You can tune a guitar but you can't "tuna" fish!
Don't hit the walls, or you'll sink!
Press and hold the button for a long as you can endure. You might even get on the leaderboard!
Because the world's hardest game is way too hard.
The longer you wait to reset the sign to zero, the higher your score. But don't wait too long, or someone else might reset it!