>>715303793 (OP)It's a 2D SHMUP where you fly around blasting aliens and robots with your heat vision. There's three stages: first stage is Metropolis vs the forces of Intergang (with Mannheim as a mid-boss) and Lex Luthor (stage boss).
Then Earth gets invaded by Brainiac (who took over Warworld), first half of the stage is flying to Warworld then fighting Brainiac'd Mongul (mid-boss), then flying through Warworld to finally fight Brainiac (stage boss).
Final stage, the entirety of Apokolips gets boomtubed over Earth, blocking the sun. You then have to face a bossrush vs the Furies, Granny Goodness, Desaad and finally Darkseid with a timer counting down to your solar energy running out. There's purposefully not enough time for you to clear the entire stage without your powers running out, and as you start to get weaker and your health starts to drain, suddenly the entire Justice League joins you for the last part of the stage, running assist by cycling in and out of the stage as they fight the forces of Darkseid alongside you, with Batman in a batwing dropping bombs on ground turrets, Wonderwoman serving as a bullet-deflecting shield if you stand behind her, and Firestorm making small artificial suns you can stand near to to slowly build back your powers. Once your power is built backup, you and the rest of the League send Darkseid packing and force him to retreat.
The loading screens and narration between stages are framed as Daily Planet articles by Lois and Jimmy.