The 1-UP Mushroom is a special power-up, but in a way, it's not really a power-up. It gives the user an "extra life". Meaning, if they happen to die, they reappear where they stood unhurt. Usually back behind obstacles in the user's way. If you're out of lives, you get a "Game Over", sending you to the Overgame (what we've named it due to the words appearing). Luckily, there's a quick and easy way out, reappearing where the kingdom's path starts, or where you've last slept. Not an exact answer on that one, it's complicated. Use 1-UPs whenever you can, wherever you can! With them, the world's a bit more dangerous, but at the same time, safer. Just... keep an extra one on hand when the red moon comes.