The theme is a dark blue, primordial water life with the game symbols represented by evolution and off sounding names.
The playing cards which are numbered from ten through to ace are also named after its symbols. For example, an Ace is called Crustacia Springum and a K is Jellocus Squidae. You only have to know that the playing cards are the lower paying and forget trying to remember their names.
The other symbols are equally entertaining if you can remember them, but the highest is nevertheless Draconius Rex. The reels also work differently and instead of top to bottom, the reels start to roll upwards from the bottom towards the top. The wild symbol appears on all the reels except for reel one and instead of a scatter symbol, it is a Free Spins symbol which is lettering with glittering fireflies.
If you get three of these, you unlock an Evolution Bonus. Three free spins award you with ten and your win will be multiplied with random multiplying amounts. A winning combination within the free spins unlocks the Evolution Feature.
During the evolution feature, a lower-valued card becomes a card of higher value upwards until the lower valued cards are removed from the slot to increase your wins.