https://www.vitoco.cl/atari/10liner/REDPILL/

Description

You have chosen the red pill... Now you need to find the path to enter The Matrix.
Instructions
REDPILL start 	Wait about 15 seconds while The Matrix is being loaded...
REDPILL move 	Use the joystick to move your pill though the Matrix code. You can move only to the left and to the right.
REDPILL opponent 	Avoid highlighted code! Being hit by those it will cost you a pill. You only have ten pills in total.
REDPILL density 	At first, there won't be many highlighted chars, but they will increase as the time goes.
REDPILL score 	When you run out of pills, The Matrix will be halted and a score will be displayed. Press RETURN key to try again.