Different Potions
After you complete a level and you get to buy things buy a potion or two. Then the potion will be green. If you don't want it green just do this: Save your game. Quit. Then load it again. Then pick the character you were. Your potion[s] should be a different color! If you want it to be green don't do this because it will change. Personally I don't like green ones. Enjoy!