In FF 2 there is a match-the-faces tile game that gives items and cash
prizes. When you are on the ice sled, hold A and keep pressing B to
bring up the game.
FF 1 Mini-Game:
While on the ship, hold down A and keep tapping B. Soon, a sliding tile
minigame will appear. The aim of the game is to put the numbered tiles
in order from 1 to 15. If you do well, you gain items and money!
Here Lies Link:
In Final Fantasy I when you visit Elfheim, press A on the left most
tombstone behind the inn. It will say "Here lies Link." Link being the
famous elf star of the Legend of Zelda series.