Stick Ranger: Cavern Chronicles/Oil Ocean

The Oil Ocean is a series of five optional stages in Stick Ranger: Cavern Chronicles. These stages do contain a lot of compo items, however. The series splits in two branches after Oil Ocean 1, with Oil Ocean 2 and 3 being in one branch and Oil Ocean 4 and 5 being in another. Oil Ocean 5 leads into the secret stage Ink Ocean, although Oil Ocean 3 is a dead end.

Characteristics
The Oil Ocean is one of the few outdoors stage in the game, and features flooded terrain. Notably, the "water" here is actually Oil, being colored a very dark grey, but it is otherwise identical to regular water.

The series uses the following Landscape:



With the following tileset:



List of Oil Ocean stages
The Oil Ocean series has five stages:
 * Oil Ocean 1 - Introduces a variant of the X head. All enemies here are X walkers, so get ready for an assault of cannonballs.
 * Oil Ocean 2 - This stage has a boss that spawns enemies... that spawn enemies. Talk about redundant.
 * Oil Ocean 3 - This is another stage where all enemies are X walkers. You can't catch a break from them.
 * Oil Ocean 4 - And now for something different - mask fishes!
 * Oil Ocean 5 - Features bombs and the return of X enemies, which seem intent on slowing you this time.

Trivia

 * Oil Ocean was based on the identically-named stage in Sonic the Hedgehog 2. As a matter of fact, its tileset is a heavily edited variant of one of the tiles from said stage.