The Free Spins Bonus is initiated by landing 3, 4 or 5 bonus symbols for 6 free spins. Your bonus will continue until you run out of spins or Fill the Screen with bonus symbols for the Grand Progressive Jackpot! Once initiated, you are awarded 3 spins and for any spin where you land an additional bonus symbol, your spins available reset to 3. The Major Progressive always remains the same but the higher your overall bet, the more frequently it will also land, presumably.
The Mini Bonus and Minor Bonus are proportional to your bet denomination, although they also will land more frequently with higher credit bets. The now classic 'Hold & Spin' bonus is initiated by landing 6 or more scattered Orb bonus symbols each of which has a credit value between 1 and 250 times your bet or it can be the Mini Bonus, the Minor Bonus, or the Major Progressive. The base game is a lines-based game where you win by landing winning paylines.