To solve the second puzzle with the gate that has 4 pillars and open the gateway later in Warrior Path in Toshi’s Love in Kena: Bridge of Spirits stand on the round stones to find out the order in which to shoot the crystal on the pillars based on the stars above the pillar. For me, the order was the far left pillar from standing on the second from the right platform, followed by the far right pillar based on the stone in the cave, then the second pillar on the left based on the far right platform followed by the second pillar from the right based on the far left platform.