Frenesis

Frenesis is a 40 level game where you have to protect a cross in the middle
of the screen stretching to the edges of the screen from waves of aliens. To
destroy the aliens as they move towards the cross from all angles, you have a
Statron which is a line stretching to the edges of the screen, made up of
arrows that can either move vertically or horizontally along the screen. When
you move the Statron the arrows point in the direction of travel and if the
end of the arrows hit an alien moving in the opposite direction then it is
destroyed.

You have a set quota of aliens to destroy within a time limit but if an alien
hits the cross then the quota goes up and if the timer runs out before the
quota is fulfilled then you lose one of three lives. As well as the main
aliens there is another type of alien that moves in three stages and can only
be destroyed on the final stage. You also have a smart bomb that can be
activated but you are limited to a certain number depending on the level but
destroyed aliens don’t go towards the quota. On certain levels you have your
lives topped up back to three and the joystick is used to control the Statron.