Toxic Tunnels

Toxic Tunnels (どくヘドロ トンネル lit. Sewage Sludge Tunnel in Japanese) is the second story level of Cortex Island (1996) and the thirty-second main level of Crash Bandicoot 4: It's About Time.

Overview
Just like in Nitro Processing, Crash or Coco having to go through several enemies, wall-running. If you find all of colored gems opens multicolor gem path and then Crash or Coco comes inside of Cortex Castle in the end of the level.

Trivia

 * This level has similarities with Spaced Out from Crash 2 and Bug Lite form Crash 3:
 * They all have multi-color gem routes, which for all colored gems of the game are needed.
 * All of them have a clear gem at the end of a multi-color gem route.
 * But unlike Space Out and Bug Lite, which are the last levels of their respective games, Toxic Tunnels is not the last level of Crash 4.