Moon Island

It's the moon. There's some moon dust in the front edge, and a green vault in the back. Blowing open the vault will let you go in, where there is a key maker (that needs pipe), and a pile of 6 uranium sand after some light parkour. The lava is lethal, so don't fall in. There's also dead robots and a bit of text with lore.

Picking up uranium sand will cause a meltdown sequence, where hot stuff starts rising. You have to parkour back out and jump off the moon. If you stay for a while, please be aware that the door resets, so bring an extra bomb unless you want to reenact the titanic in there.