Sometimes I don't understand how simplest games like this tend to be the most popular. This game doesn't have any new mechanic/new combination of mechanics that are seldom/never seen before. All this game has is the simple single player agar.io experiences. Perhaps I'm too edgy to understand how normal people thinks? Perhaps people prefer things they are familiar with rather than thing that are not?
The art style of this game is very nice, though. This game should be at least 5 times more popular than Flappy Bird, in my opinion.