Hidden Menu
Press Start on Controller #1 to bring up the pause menu. On Controller #2, press Up and A then a screen with the options ''Continue, Save, Retry'' will show up.

Red Potions
If you bought a red-colored Water of Life, when you use it once, it turns blue, meaning you can only use it once more before it disappears. To refill it from blue to red without buying a second Red Water of Life from the Old Woman, buy a Blue Water of Life. Doing so will make it red again.