Thanks for playing. Yeah, I didn't make use of a hole as a game mechanics. My point of departure is being different, be innovative. I'd like 3-4 ideas come to my mind at first. Like a black hole moving around to eat everything. But, I didn't choose those ideas, because I knew the first few ideas must be duplicated easily. I'm not say copying game ideas, but different people getting the same idea. Therefore, I make this kind of lovely casual game.