6/7 - Swamp NPCs

The "swamp" is the extension of the highway out of the "cemetery" ... the map isnt implemented for it yet.

But I added several NPCs,
- a fairly agressive and hard Mutant NPC
- frogs that jump, tongue, or spit
- mosquitoes that are just contact damage and hover

The lower area does have mushroom people, you will need to slide under the gate to reach more of them.

A lot of these NPCs are inspired by Ender Lillies. Very simple, projectile based.

Again thanks for playtesting.