Health, Enemies, and XP

Modify the code from class to pick up health and mana potions and use them to add 25% to your health and mana when you press 1 for health and 2 for mana. Using a simple set of integer numbers  add 1 to each number when you "pick up" a potion and subtract 1 when you use a potion.

Build your "medieval" level out with 3 levels of enemies, a "Level 1" zone, a "Level 2" zone, and "Level 3" zone.