Shovel Knight, Yacht Club Games' little blue digger, is one of the most anticipated games currently in development. A new trailer was just released for the game showing off several previously unknown elements.

The new footage shows off underground caves of both the lava-filled and rock-only variety. There also appears to be some sort of floating fortress or airship level as well. Lava fish spring up from the boiling depths to attack, while gelatinous slimes bound toward you with all of their might. Finally, the airship level seems to contain flying jellyfish.

Winter is the planned release date for this retro action platformer, and it's coming to Windows, Mac, Linux, Wii U and the 3DS for $15.