Yes, the Ocarina is a real instrument.
No. Valley of the flood has a completely different idea and if it were a real game, would be after ocarina of time on the timeline. skyward sword is before ocarina of time.
ocarina of time
Ocarina of Time
There are 100 Skulltila in Ocarina of Time.
Shadow gauntlets are not in ocarina of time.
There is no such thing as a shovel in Ocarina of Time.
The rock people in Ocarina of Time are Gorgons.
The Ocarina of Time is the blue one, the Fairy Ocarina is the pinkish one.
You never meet Zelda's father in Ocarina of Time.
Songbird Ocarinas has them!
I believe that the Ocarina of time and the Fairy ocarina are both tuned in the key of D