Not sure I understand -- using the menu to reset the game or switch game works fine at home, but the uploaded scenario seems to want to 'stop' when these are used in 'Greenfoot'.

Think you have found a neat image? Leave a comment with coordinates and parameter values and, if worthy, I will post that location with your name!

Busch2207, if you have a question, or want, I would be glad to DISCUSS it with you. Create a new DISCUSSION named something like 'On Pot Luck SuDoku'. Use either tag (Programming/Other).

Mik suggested having the people procreate and age and see what rate of infection would kill off the population. I say that is a good idea! Use the scale() method to 'grow' the images; with a variable to keep track of the age of the person. You could use this variable to adjust the chance of infection (the young are less likely to catch the infection). Also, the age could be used to make the un-infected die off even when not infected (chance of dying increases as age increases).