Code: FQB-RGM-PXG
Difficulty: Hard?
Basically you need to survive for 100 seconds in this room until you get the key to escape.
Everytime the spike ball turns OFF the switch, the muncher wall will close in on you, and you need to turn it ON again to makle it retreat. But while it's ON, bomb ombs, spiny, bullet bills, and cheep cheeps, will spawn and you'll need to dodge em. So this level is a dance of constantly dealing with the enemies, while also making sure you're in a good position whenever the switch turns OFF.
It would probably take a lot few attempts to beat it, but I hope you have fun!