when I stopped playing to write my previous comment, I figured out an interesting outcome by coincidence. if you start the game and give no input at all, a nice pattern emerges naturally, reminding me "game of life" of great mathematician john horton conway :)
from game design perspective, this led me to think impact (and maybe importance as well) of changing random state/seed to create more non-uniform gameplay especially in kind of procedural games like these.
P.S.: below is linked mode, in unlinked mode, pattern is emerging much slower than linked one because of slow-motion effect.