The types of prizes you can get include 80x offline bets, used to find mysteriously encoded letters, up to 160 times the battle of Hades and Hera, and up to 240 times the leader of the fighting god, Zeus. If he loses it in battle, you can even win up to 400 times the recovery of Poseidon's powerful trident.
All you have to do is choose the ideal total bet for each rotation between 0.2 coins and 100 coins - then rotate those reels until you decide whether the fight wins or loses.