Famitsu magazine in Japan has detailed four monsters that will appear in the game, including:

• The spider-like Nelskura that lives in caves and attacks with its claws and web.
• The Tetsukabura which attacks the player using rock it scoops up with its jaw.
• The Gypceros that uses a variety of attacks including venom and a light that knocks out the player.
• The Yian Kut-Ku that can spit fire and can use smaller monsters to restore its health.

There will also be a new area known as the Underground Cavern. You can check after the break for some more screenshots from the game.