Physics blocks

[TODO door blocks and all that jazz] [TODO misc blocks like different TNT, c4]

Hunter

In-game blocks: Zombie, Creeper, Snake

Actively chases players and kills players if it gets close enough to them. Can climb up one block gaps.

Crepeer will explode upon killing a player.

Birds

In-game blocks: Dove, Pidgeon, Duck, Phoenix, Red_Robin, Blue_Bird, Killer_Phoenix

Flies aimlessly around in air blocks, dying if they collide with a wall.

Killer_Phoenix will actively chase and kill players it touches.

Fish

In-game blocks: GoldFish, Sea_Sponge, Shark, Salmon, Betta_Fish, Lava_Shark

Swims aimlessly around in active_water blocks.

Shark will actively chase and kill players it touches.

Lava_Shark behaves like Shark, but swims in active_lava blocks instead.