Need help improving number guessing game

[feba]

I added the ability to select your own range. It takes two new
modules:

def customrange(game, lowunsafe=True):
    game['defrang'] = False #Keeps setup from changing range to
defaults
    while lowunsafe: #makes sure that the low number is positive
        picklow = int(input("PLEASE PICK THE LOW NUMBER: "))
        if picklow < 0:
            print("LOW NUMBER MUST BE POSTIVE")
        else:
            lowunsafe = False
    pickhigh = int(input("PLEASE PICK THE HIGH NUMBER: "))
    if pickhigh - picklow <= 2: #see setup().
        print("HIGH MUST BE AT LEAST THREE GREATER THAN LOW")
    else:
        game['minr'], game['maxr'] = picklow, pickhigh
        print("RANGE IS [%s-%s]!" % (game['minr'], game['maxr']))

def wantcustom(game, unsure=True):
    #Allows user to decide their own range for guessing.
    while unsure:
        pickrange = input("WOULD YOU LIKE TO CREATE A CUSTOM RANGE? Y/
N: ")
        if pickrange.lower() == "n":
            game['minr'], game['maxr'] = 1, 99 #Default range
            unsure = False
        elif pickrange.lower() == "y":
            customrange(game)
            unsure = False
        else:
            print("INVALID INPUT")

A slightly updated setup (it needed it anyway):

def setup(game):
    #minr, maxr make minimum and maximum. Can be adjusted.
    #Make sure that maxr - minr is at least 3.
    #1 or less would be impossible. 2 would only have one guess for
victory
    #The first would be unplayable, the second would play itself
    if game['maxr'] - game['minr'] <= 2:
        raise ValueError("INVALID RANGE!")
    game['gcount'] = 0 #Reset guess count
    game['target'] = random.randint(game['minr'], game['maxr'])

and putting wantcustom(game) immediately before setup(game) in main().