Objective 1: Find the Yellow Microchip
There’s one lantern planet to visit–Qward. To navigate there, Martian Manhunter requires the yellow microchip, which he has located. The microchip is in Doomsday’s cell in the containment facility. Head there at once!
Once inside the containment facility, you find a pile of LEGO bricks on the platform outside of Doomsday’s cell. Build these into a violet lantern pad.
Have Star Sapphire interact with the lantern pad to manifest a construct of a female tourist inside of Doomsday’s cell. This serves to distract Doomsday.
With Doomsday distracted, have Martian Manhunter pull on the super-strength handles attached to the cell door. After he rips the door from its hinges, claim the yellow microchip. With the microchip in your possession, head back to the control room to set a course for Qward.