Minor bug fixes and improvements

Changelog

1. Game should load in Waterfox browser now
2. Less time wasted when getting back into a new or seeded world after you die. When a world is not seeded however, the time is still a little longer, because a new world will be built. But when seeded all maps are reused.
3. Fixed an item that didn't appear in an underwater prefab (s 4 layer 3)