Typical - despite having a job to do, The Bull is too busy gaming to do it.
He's clearly not having much luck at it, so try offering to play the game for him.
Good luck with that - this game's HARD. You basically need to trial-and-error it.
See the quickhints if you need help getting past the doors.
First safe door: ? Second safe door: ? Third safe door: ? Fourth safe door: ?
Door 4 (IV)
Door 3 (III)
Door 1 (I)
The unicorn's riddle seems unsolvable - even with your gaming abilities.
You'll need a training montage - or to pester a developer.
There's no Twitter to harass them on, so you'll need to look around town to see if you get lucky.
A neighbour on Tony's street - the guy wrapped in christmas lights - is one of the developers of the Bull's game. He might help us out if we do him a favour.
He'll tell us how to solve the unicorn's riddle, if we can bring him an extension cord. Sweet!