The game prototype has been updated (0.4.0):

• New biome: Volcanic Taiga.
• New creatures in the new biome: Bear, Moose and a Volcanic Bear (boss).
• The new biome has volcanos that can hurst the player and unlucky mobs.
• New Boss with special enviroment effect (no details to not spoil it)
• Warmth System: the player now gets cold, and can warm up at a campfire. Wearing a coat also helps. Rain also makes the world a tick colder. The new Taiga Biome is colder than the starter Forest Biome.
• The difficulty has been tuned down a bit (predators don't chase the player from such a long distance anymore). In the future adjustable sandbox difficulty settings are planned.
• Camera movement has been reworked a bit. Now the camera faster centers on the player if we don't use the WASD/Arrow keys to look around.
• Misc bugfixes and typo fixes.

Have fun,

Matt