Okay, I have absolutely no idea where to go. I just killed Draygon (and if there are items, I don't know where to find them) and yeah. I can't get out. I also know how to get to Draygon without the super missiles but since I'm stuck in Draygon's room, I think I'll wait till I get out. Thanks.
That was my little moment of supreme evil. I really debated over whether to include it. I hope you have a savestate with Draygon still alive.
You have to kill him while above that line of blocks. How you get up there is your puzzle.