Gold Rush is a 5×3 slot with 25 Pay Lines, at an RTP of 96.50%, and a maximum win of 1700x stake.

Landing scatters triggers Free Spins where every gold nugget collected fills a meter. As the meter advances, the miner symbols upgrade to higher paying versions, increasing the value of all future wins. 

More nuggets add extra free spins as well, letting the upgraded symbols dominate the reels. The entire bonus becomes a climb toward fully upgraded miners and repeated boosted payouts driven by continuous gold nugget collection.