The game itself is just more free-to-wait garbage in the same vein as Dungeon Keeper Mobile. Feel free to enjoy the same gameplay as games like Wildlife Park, but instead of being able to actually create a zoo the way you feel, you get to place one item, then wait for days if you don't pay the ransom. If you do pay, then all you get is another wait to try to grind dailies for a tiny trickle of the diamonds that are the real currency.
That's not the real problem here, however. The problem is the developer, who is yet another example of a forum tyrant indie "developer" who gets upset enough to ban anyone who levels any form of criticism, and go through the negative reviews to argue with anyone who leaves a negative review (I await your passive-aggressive "I'm totally not insulting you, you're just too STUPID to realize how totally not fighting with you I am!" response!)
You can see the horrible, horrible thing I did to deserve my own ban, here, when I created a thread telling the "developer" that picking fights with his customers is not exactly good publicity for his game.
https://imgur.com/a/v7R9u
So, since he banned me for making any kind of comment (and then responded an hour after banning me so that he was shielded from any sort of response to his response - KLASSY!), I just downloaded the free-to-wait game and made another negative review, since he can't delete that. TEEHEE!
That said, after pointing out that the game had a negative Steam review score, suddenly, MYSTERIOUSLY, the score suddenly jumped up to exactly 40%, just enough to get a "mixed" review score, just like all the other games from this "developer" has. This "developer" sure seems totally legit, folks!
UPDATE: Now that I have the ability to edit this review again, I just want to put up that he also flagged this review to try to get it deleted, as well. *slowclap* Also, as the developer response states, my ban was "an accident", but then went and deleted the thread that was previously just locked because someone else posted on it after I was banned. I got it on the wayback machine first, though, because I have NO IDEA how I had the foresight to think it might be necessary: https://web.archive.org/web/20180308125614/http://steamcommunity.com/app/694130/discussions/0/1694914736017534643/
That said, the games seem to be going in and out of "mixed" and "negative" review totals even though the total number of reviews doesn't fluctuate that wildly, so it seems like this might be Steam being schizophrenic rather than actual foul play, at least in this regard.