After adding actors into world, use the 'Save the World' function to automatically place them upon reset (main menu bar -- Controls >> Save the World)

@Roshan123, how is this related to this scenario? ... start a new discussion thread under "Other". If I have anything to say about it, I will respond there.

@Roshan123, No. All users who run this while logged into greenfoot SHOULD be listed. However, I believe the scenario has broke since the change-over to javascript.

@mariq_rasyid29, please start a discussion thread on your issue. Explain in detail what you want to accomplish. Show any related codes.

I would be interested to see how you coded this. It is not simple code. How much help did you get for this? I created a working model of it and realized how involved it was. I only used Actor objects for the clickable boxes. I thought that having actors for the main grid would just make things more difficult to deal with.