It's nice to see a newer game in which the waiting/energy system doesn't get in the way of one's ability to play as long as desired. It's also nice to see that the premium content is relatively cheap and limited in usefulness.
I'm going to go out on a limb and say that the rating (And possible reviews) for this game are being tampered with. At least three of the current "best" reviews look like the same sort of spam you'd see in the iStore... Two of which are from accounts which have done nothing on Kong other than comment on this game. Reviews that are not positive are being mass downrated.
The game itself is just a generic match-3. Unless Kong's community has degraded even worse than it seems, I am calling shenanigans on the game's current 4+ rating.
Any and all downloadable games shall receive a 1/5. Unity and Java were one step too far out of the realm of safety. The support for a (paid) iPod app was ridiculous. But now; supporting downloadable games? Purely unacceptable, especially if they get badges.