from random import randrange

player = ()
player_exp = 0
player_hp = 20
player_strength = randrange(3, 9)
player_level = 1

imp_hp = 20
imp_strength = randrange(3, 5)

if player_exp == 10:
    player_level = 2
    player_hp = 31
    player_strength = randrange(4, 10)

if player_exp == 20:
    player_level = 3
    player_hp = 39
    player_strength = randrange(5, 11)

print("You enter a cave to eliminate the demons. You have been ordered by a nearby towns Mayor to complete this task.")
print("As you enter a cave, the first room contains a small, flying creature. You ready your iron blade.")
input("\nEnter any key to commence battle: ")
print("\nThe small creature see you and rushes to attack!")

while imp_hp >= 1:
    input("Enter a key to roll an attack: ")
    Battle = imp_hp - player_strength
    print("You inflict")
    print(player_strength)
    print("Enemy's remaining HP:")
    print(Battle)
    imp_hp = Battle