Colony Flow Level 15 Walkthrough

Colony Flow Level 15 is a 7x7 grid with four colors and a diagonal obstacle. This is the first level where you truly need to plan 3-4 moves ahead. Start by routing the two colors whose endpoints are nearest the corners — they have limited options. Then route the longer colors through the middle, using the obstacle to separate them cleanly. If stuck, work backwards from the solved state and reverse-engineer the moves. Level 15 is a big difficulty jump — don't be discouraged if you need a few restarts.