When you see one of these cockroaches on the screen, they look very real. They even walk around the same way real cockroaches do. You can make beautiful laughter, if you like these types of jokes.
You can manage all cockroach settings from system tray cockroach icon where you can enable it for startup, add more cockroach on desktop and exit option also.
Application use less system resources so you can use it without think about system speed worry.
Please try it...