it's not a bug, it's a feature. The game still works nevertheless
if you wish to refine , Maybe you want to add a tier mechanic because the only difficulty increase is from new dots appearing, which can be mitigated by eating a dot to reset the decay timer. Maybe with each tier there would appear a circle of dots on the outer edge, "the world decaying" making passing to the other side effects the field a taxing move, yet at the same time clearing a path that may be used.
But. I think it's fine the way it is. Great game jam game.