Snow Go

Snow Go is the second level in Crash Bandicoot 2: Cortex Strikes Back. It is the first snow/ice level to appear in the series, and as such, parts of it are devoted solely to teaching Crash how to use his new skating mechanics on various icy patches in the level. It is also the first appearance of Nitro Crates on the main path of a level, as they only appeared in the secret route in Turtle Woods. The Red Gem can be found in this level - the developers intended for the player to have to unlock this level's (considerably more difficult) secret entrance path in the sixth warp room by uncovering the secret exit in the stage Air Crash, though it can also be reached from this level's main path by fiddling around with a nearby arrow crate.

Penguins
Simple Penguins that like to spin around and get dizzy. Can be defeated with any attack except when it's spinning.

Seal
Brown fur seals that can be defeated with any attack. There are also two instances when three seals materialise at the top of an upwards slope and slide down towards a chasm. Any attack can still get rid of them.

Rock Crusher
Once you're under one, get out of the way before it comes down and smashes you.

Log Crusher
Similar to a rock crusher, these machines crush at frequent intervals though and you time your plan to escape them.

Trivia

 * This level's name is a pun on the phrase "no-go", meaning to not function properly, and, as such, not go. Appropriately, this level's colored Gem is red, the internationally accepted color of "stopping", aka "no-going".