Colony Flow Level 19 Walkthrough

Colony Flow Level 19 uses a horizontal-barrier layout — a row of blocked cells cutting the grid in half horizontally. Paths must route around the barrier via top or bottom gaps. Assign colors above the barrier to top-route, and colors below to bottom-route, then connect any cross-barrier colors through the side gaps. Level 19 teaches barrier navigation — a mechanic that appears frequently in mid-game levels.