Green Plains Zone is the first zone in Sonic the Hedgehog 5. It's a typical first level stage. The land is a valley near a beach. It contains corkscrews, loops, and lakes. Sonic and Tails crash land here after Fang the Sniper shoots the Tornado down. You will unlock Tails after defeating Eggman in this zone.
Act 1[]
The starting level. It's a mashup of Angel Island from Sonic 3 and Palmtree Panic Zone from Sonic CD. There is some corkscrews, loops, and a few Badniks. It is the easiest level in the game.
Act 2[]
The second level is more beach themed than Green Hill themed. It's a beach level with bubbles, lake streams, and it contains Springs. At halfway throughout the level, Fang shows up and presses a button that sends you to the ocean floor.
Badniks[]
Aerobug: A red and blue Motobug, but instead of driving it flies.
Camobush: A Badnik in disguise of a bush. It takes two hits to take it down.
Doomphin: A robotic dolphin. It is the only water Badnik in this zone.
Boss[]
After completing Act 2,Eggman shows up and fights you. He will be in his Egg Mobile with a swinging hammer just like the wrecking ball from Sonic 1. Eggman will try to hit you with the hammer. Unlike the wrecking ball fight, there is no two platforms, so the player has to hit the machine on the bottom. After 7 hits, he will throw the hammer causing a shockwave just like how Eggman shoots the drill in the Egg Mobile D in Sonic 2. Unlike in Sonic 2, Eggman can make a new hammer. After 1 more hit, the mad doctor flees and you get the capsule with Tails.