Variable Resetting Issue

[j.crater]

Here is an outline of how I would approach the task:

Output:
imports
initial variable assignments

define rps (input current credits)
    play a round
    return new credits

define roulette (input current credits)
    play a round
    return new credits

define coinflip (input current credits)
    play a round
    return new credits

loop:
    choose game mode
        play a game
        play another round or go back to loop

It is very simplified, but I think you can get some good ideas from the example.