What's the difference between a hippo and a zippo? One is really heavy, the other is a little lighter.
Press and hold the button for a long as you can endure. You might even get on the leaderboard!
Every 108 minutes, the button must be pushed.
Whatever you do, you must not press the red button.
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!