Sparks was released in July 2015.
Sparks uses 20 paylines, but players are able to choose to play from left to right, or both ways, creating 40 paylines.
The game also uses special wild symbols on reels 2 and 4. These symbols can expand, but this happens at random, so they expand up, down, or cover the entire reel. Also the special clone feature is triggered when one or both of these wild symbols appear.
The symbols on the left of the wild symbol will be copied to the right of the wild symbols. And when both wild symbols appear, the second one will do the same, creating full lines of the same symbol. When both symbols are fully expanded, all 5 reels will have the same symbols on them. Creating a big win.
Sparks does not come with any other bonus games or free spins features.