Oinky Tonk vs Zen Koi 2
Oinky Tonk
Oinky Tonk is a casual game where you get to spin a wheel to decide whether you can attack another player, build your island, or plunder others' islands for money to fund the construction/decoration efforts for your island. There are, naturally, many islands that you will be able to progress to and eventually own.However, you can, in turn, be attacked (destroying some of the stuff you've built) and plundered (lose your cache of cash) as well so it would be wise to have shields on at all times. You can perform retaliatory attacks, thankfully, but this only works if your enemy doesn't have a shield on, obviously.
Generally, this game's gameplay is pretty similar to Pirate Kings and many other casual "Spin the Wheel"-type games, including its adorable graphics and fancy animation effects, and hence, Oinky Tonk would serve as a great alternative game to play.
Zen Koi 2
Zen Koi 2 is the exciting sequel to the popular breakout casual simulation game where you get to own a pond filled with beautiful and varied Japanese carps, and breed them to get new patterns to complete your collection. Following in the success of the original game, Zen Koi 2 offers fans and new players alike the same meditative and relaxing gameplay it became popular for while providing brand-new Koi patterns to collect.However, the main selling point of this installment is its highly-anticipated new game feature - the ability to decorate your own fish pond. The game even has a new Dragon Realm where you can play with your dragon-ascended Kois.
Being recently-launched, Zen Koi 2 may not have the player numbers that its original enjoyed, but this sequel is definitely better than the latter in so many ways. If you love Zen Koi, you'll most certainly enjoy playing Zen Koi 2!