Some examples of the disclosure are directed to a virtualized system on an electronic device. In some embodiments, a simulator application that includes a guest operating system is provided on an electronic device. In some embodiments, the simulator application provides a testing environment for a virtual experience of a secondary application that is in communication with the guest operating system. In some embodiments, the electronic device displays a user interface associated with the simulator application, the user interface including a computer-generated environment and an object. In some embodiments, while displaying the user interface, the electronic device receives an input that corresponds to a request to cause the object to perform a respective operation in the computer-generated environment. In some embodiments, in response to receiving the input, the electronic device causes the object to perform an operation based on the input and updates the computer-generated environment based on the operation.