Major features include a 13x free spin feature activated when three or more bizarre bunnies (Hey, that's what it says here) appear to triple all wins, and a "Pick a Pumpkin" bonus round whenever three or more SCATTERing pumpkins appear.
Halloweenies promises to be on the "treat" side of the "trick or treat" equation when it comes to jackpots, too. At five coins per payline on 20 paylines a maximum bet can deliver a jackpot of 32,500x in the base game alone. And with free spin multipliers and bonuses, this can grow to a crazy 97,500x. Scary.