The fiery sun is the wild symbol, it will substitute for all of the other symbols, except for the scatter symbol, to help you land winning combinations. Whenever you land a wild on the reel, regardless of whether it helps to form a win, it will lock in place for one more spin to help you form even more wins.
The scatter symbol is a spinning galaxy.
Whenever you land a win on the reels, the positions involved in that win are awarded a multiplier. The multipliers begin at x2 and have a spin counter that starts at 3. This counter goes down with each spin and the multiplier disappears when the counter reaches 0. If you land a win over the multiplier position then your winnings will be multiplied by its value and the multiplier will increase by x1. If your combination covers two win multipliers then the two are added together before being applied to your win, for example, a multiplier of x2 and a multiplier of x3 result in a multiplier of x5. The multipliers can reach x10 and if they do so then you are sure to win some huge payouts.
If you land two or more scatter symbols anywhere on the reels they will add multipliers to their reel positions or increase any multipliers that are already there by x1. If you land three scatter symbols then the Galactic Free Games feature begins. You will be awarded 10 free games during which all multipliers that are on the reels are frozen in place for the duration of the spins, and can increase just as in the base game.
Galactic Streak has a top payout of 125x for landing four wilds along a payline. The red and purple planets can both payout up to 50x, the orange and pink planets can both payout up to 25x, the two blue planets can payout up to 20x, and the green and grey planets can both payout up to 10x.