Factory Breakout

Wait at the bottom of a screen until the fast yellow monster nearly reaches you. Then dash up a lift and wait at position 1 or 2 (see photo). In these positions the monsters will always come up through door A. You can then escape downwards through one of the two outer doors on that platform. Only use the force fields in emergencies or at the end of a screen to gain extra points.

Wait to the right of each reject ray until the bell is moving in your favour (scrolling left), then dash under the ray. Remember the lighter the colour, the faster the ray (white being the fastest).

Wait at the bottom of the screen until the fast yellow monster nearly reaches you. Then dash up a lift and wait at position 1 or 2 (see picture). In these positions the monsters will always come up through the door A.