I have stared and stared and stared at level 8-4 of The Last Rocket and can't for the life of me figure out how to get to the exit.
I've flown from each corner of the left and right wall. I've tried walking and flying through what looks like an opening to the right of the bottom fan. I've tried turning around close to the enemy, to see if I can pull him from the wall. All to no avail.
What do I do to get past this level? How do I get to the exit?