Go take a look into wifi connection on your cellphone \tablet and look for galaxyRVR network and enter 12345678 as password.
Or you can change wifi mode to STA into Arduino code, galaxyRVR.ino and enter information of your home wifi.
Weirdyguy is correct.
If you are connected in AP mode, the IP address will be 192.168.4.1.
If you are connected in STA mode, the galaxyRVR will be configured with your home WiFi information. If you want to know the IP generated after configuration, you can check the connection status of your home WiFi. There will be a separate IP for the successfully connected device.