Hunting for alien robots

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You are participating in a battle with alien space robots to protect the earth from the invasion of alien invaders. Initially, you are given one life and two armor. The amount of armor can be increased - there is a special button on the screen. A number is indicated above each robot - this is the number of hits needed to destroy the alien. You can take armor-piercing shells that will blow up any robot with one shot. You can't touch any objects - you'll explode right away. The armor only works against enemy shells. Use the left side of the display to rotate the weapon. The exit to the next level is located near the starting position.