The Cat Queen is the wild symbol and she can substitute for all the other symbols, except the scatter.
The pyramid with the Eye of Horus is the scatter symbol and as well as offering scatter payouts of up to 50x the total bet, it is also key to the free spins.
If you land three or more of the pyramid scatter symbols anywhere on the reels you will be rewarded with 15 free spins. Furthermore, the free spins can be retriggered indefinitely by landing more scatters.
There is a gamble feature that you can use after any winning spin to try and increase your winnings. You can risk all your winnings or just half and all you need to do is pick from four facedown cards to find one that has a higher value than the dealer's does.
Cat Queen offers a top payout of 1,000x for landing five wilds across a payline. The pharaoh symbol can payout up to 200x and all the other symbols offer payouts of up to 100x.