Not a slot machine. No "chance" involved. After playing this a ton for 2 weeks it was easy to figure out. This is not a chance game. The bonus pay u based on how long u stayed on the machine. It becomes clear u only win big if u dump a lot of time into something. If your looking for slots, this is not it. Bonus happens almost every 20 minutes like clockwork. If u hop on a new machine and hit a bonus early, u will get a weak bonus, if u have been on a machine for 20 minutes, pays off. Simple.