Mining Rush is a 7×7 slot with Cluster Pays, at an RTP of 96.56%, and a maximum win of 10 000x stake.

In the base game, when a dynamite themed bonus symbol is visible at the same time as a winning combination anywhere on screen, the symbol turn into a nugget either bronze, silver, gold, or diamond

These nuggets remain on the reels for the remainder of the tumbling sequence, randomly awarding a win from a range of values depending on its type 
Each time it pays, the nugget also collects a point, with three points upgrading the nugget’s type unless it is already diamond