The slot is a fish based theme slot with underground sea things like starfish, crabs and treasure as low paying symbols and the real deal fishes with high paying symbol. Really something different other than the normal card deck symbols slots. Wild appear on reels 2 and 4.
Free games can be triggered by landing the free games scatter icon on reel 1 and 5. You will get 7 free spins. During free spins all wins are x2.
The free spins have an extended feature to get more and more free spins. Which means on spin 7 extra bonus symbols appear on reels 1,2 and 3. If you hit all 3 bonus symbols, the free spins feature will extend. During bonus game reel 5 is made up of wilds similar to money farm 2. The bonus game last spin can extend the super games feature and after this the mega bonus feature is triggered. The super games feature upgrade the multiplier to x5 for all wins and the mega wins turns reels 4 and 5 into wilds making bigger wins more possible.
I have only triggered the bonus game feature. I think you must be very lucky to reach the mega wins extended feature where all other extras are enabled with big multiplier. I think this game is good for wagering as it keeps a steady balance. The most I won was x300 my bet.