To pass the 3 veins where the viruses are propagated to gain the play. Vein 1: destroy 5 viruses and avoid the red globule. Vein 2: destroy 10 viruses and avoid the rain of red globules. Vein 3: destroy 15 virus and avoid the red globules arriving on any sides. When you eliminate 3 viruses without losing life, gravity becomes 5 times less powerful ! If your Macrophage dies, it’s lost! If the human in which you are dies, it’s lost!