Is it permissible to program games that do not contradict the Islamic creed and sell them to offset the costs of programming free Islamic applications, and what are the legitimate controls for that?

Programming and selling games is permissible if they are free of forbidden elements such as music, ideas that promote vice, or those that turn people away from the truth. Cartoon images for children are exempted from prohibition, and purposeful, permissible games are more deserving of permissibility and benefiting from their profits.