very easy. just go with strength and reproduction, and some defense for the rest. it was hard the first 4 levels but after that it was really no challenge. very good game though
LVL 9! first shoot a portal in the roof and one on the floor right under it. jump in. on your way down from the roof shoot another portal in the floor.
second shoot on the floor in the middle gap(jump shoot) then jump in the portal where you started(from the ledge you are on) and you should be on the second ledge
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