UPDATE 7 - SKILLS AND POWER-UPSFight your way through waves of pesky aliens using the brand new skills and power-ups system. Earn skill points by completing planets, higher the difficulty more skill points you earn. Unlock weapon upgrades by completing perfect runs. Lay waste on your enemies with tactical orbital lasers and plasma cannons, slow down time, improve and overcharge your weapons, create holographic decoys, release swarms of flying quadcopters, unleash an army of spiders, place minigu...