Sounds like VoiceOver is activated, you can deactivate this feature simply by slightly pressing 3 times on the home button fast. Then the stupid squares and voice will stop and it might help you proceed.
Depending on what version of iOS you are running, if an update is available through iTunes, go ahead and do it, there was a bug with some phones with the iOS 9 that prevented some phones and some iPads from booting correctly.
Start by removing the VoiceOver functionnality, you should be fine afterward.
Regards.