Well, they are placed on a matrix structure, but as they are presented as a fake "hexagonal" distribution, there are some tricky things to take into account when you want to pop the correct bubbles. I'm not yet comfortable coding with stencyl, that's what I wanted to know if someone had had this experience before, because in the end i'll have to make an algorithm that finds neighbor bubbles of the same color, and I think some recursion would be handy, but right now I don't have the necessary knowledge of stencyl guts.