Wager between 1¢ and $2.50 per payline over 20 paylines in Gusher’s Gold; as always, betting max paylines allows for the jackpot payout. Said jackpot win is worth 10,000 coins at max bet (so $25,000); the free spins icon will award five free spins when three icons are displayed, 10 free spins when four land, and 20 free spins with five on the reels.
To juice up spins in reel play, the oil barrel symbol is an expanding wild appearing on the first, third and fifth reels, filling the column in which it appears. A bonus round is triggered with three or more of the bonus symbol (a drill bit in this case, definitely one of the stranger such symbols anywhere); this one's a pick 'em round worth a random number of coins.
For the truly big payout, there's the "Oil Pump Jackpot," a randomly triggered win worth thousands of coins – Texas tea, that is – in the Gusher’s Gold slot at Rival-powered online casinos.