Video game music quiz

What I think is memorable music from my video gaming youth.

When I've provided years as hints in the answers, they are the years of the original release (as far as I can tell from the internet).

Question 1
Startup/title music for which game?
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1991 the developers were 'brothers'


Question 2
Start-up music during cinematic opener for which game?
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1991 action platformer


Question 3
Main menu and game options music from which game?
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racing game, it's a sequal


Question 4
Other ports had slightly different versions of this song. Started life as a 1987 arcade game.
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music based on a song from a 1930's movie.