This Ainsworth slot does provide some intriguing base gameplay. However, one of this developer’s slots wouldn’t be complete with incorporating some special features alongside. Fortunately, Rumble Rumble does have some of these. First of all, you’ll get to see a wild icon come into play on all reels. This comes in the form of the word, ‘WILD’. If five of these show up on a winning bet line, they provide a huge pay out. Furthermore, wild icons can substitute for all other symbols on the reels in order to form a winning combination. The only exceptions to this rule are the scatters, the Wild Coin and the Fire Bull.
Speaking of the scatter icon of this game, you will see this in the form of the gold coin with the image of a bull on it. This can appear in any location and still offer up a pay out. Therefore, if five show up in any location, you can receive up to 1,000,000 coins as a reward. Furthermore, three or more of these scatter symbols will trigger a total of eight freespins. This round first of all sees all reels expand to nine positions. The Fire Bull icon comes into play during this round too, and it will appear on the top three positions of reels two and four. The coin icon can also only appear on the top three positions of each reel. Both this and the wild coin are scatter symbols. The wild coin will also substitute for all other symbols, except for the bull.
The Fire Bull icon is also responsible for activating its own feature round. When this symbol shows up in one of the blue bordered positions on reels two or four, all symbols on that reel transform into wilds. If it shows up inside a red bordered position on reel two, all symbols on reels one, two and three transform into wilds. The coin icon, if present on these reels at this time, will transform into a wild coin. And if the Fire Bull symbol shows up in the red bordered position on reel four, all the symbols on reels three, four and five transform into wild symbols. Again, the coin icon will transform into a wild coin. Finally, if the Fire Bull appears in both of these red positions, all symbols across the game become wild. Or, again, in the case of the coin, the wild coin.