took me... a few hours for this...

3. Construction Chaos Zone
Level:
A new base which Eggman is developing for strategical purposes. It’s in its very early stages of construction but still a threat nonetheless.
Act 1:
Very similar to Marble Garden & based on your picture.
The outer landscape of Eggman’s construction area. In the background, a much more technological and mechanical base is able to be seen.
It is riddled with falling objects from construction, most of which hurt you. There are a few (i.e. very large falling blocks) that crush you. Badniks-- that of which would do heavy labor-- are everywhere.
Several technological dodads, such as loop boosters (the ones in Death Egg Zone) and the spinning things from Marble Garden are used to navigate the zone.
Platforming heavy, and reflex based (some sections where you have to get out before objects fall on you). There are several many paths, including an underground path as well as a path along the wireframes and steel bars of structures.

EDIT: didn't realize the Tornado there, so that could serve as a beginning section with the same falling object gimmicks and similarities to Sky Chase.

Act 2:
Far more fast paced than the last act. Takes place in the heart of the base, which is more typical of an Eggman base.
Highly technological-- think a cross between Death Egg Zone and Launch Base.
The gimmick of this level is that you’re being chased by what is later the second miniboss of the zone, “Security Force”. It’s quite similar to Death Egg Eye, but has a body similar to Metal General from Kirby’s Return to Dreamland. It’s surrounded by orbs, like Flying Eggman.
The miniboss constantly fires horizontal lasers, even when you are well ahead of it. Despite being chased by it, it is not an autoscrolling level.
If the miniboss passes you, it will begin to drop bombs that destroy the ground below, revealing pits. If you aren’t quick enough, it might open up an impassable chasm, stopping your progress. It doesn’t prevent you from completing the level, as usually a spring might appear right before the pit which takes you on the second path, which is much more hazardous. Eventually it leads back to the main route, where SEcurity Force begins chasing you again.
Eventually, all the paths join to one, horizontal room, where a wall begins to enclose on you. Attached to the wall is Security Force. There are many bumps, Badniks, and falling objects, Quick manuevering is required, lest you are crushed by the wall.
Getting away from the room leads you to the battle against Security Force. Following Security force, you face the boss, Egg Crusher.

Act 1 Miniboss: Director Bot
- An Eggrobo-like robot, but it wears things typical of a construction manager
- By itself, the Robot is weak, only taking one hit to beat. However, before you can fight it directly, it summons construction-based minibosses that only take 3 hits to beat.

1. Mechrane
A giant crane (basically the machine with a crane's head) that appears in the background. DB summons it and pilots it. The attack pattern is simple and repetitive: First, it jumps up and down, causing objects from the construction above to fall. Mechrane then uses its beak-crane to pick up an object.
 -- this is where it can be hit. When it is hit, it reels back in "pain"' and tries to slam Sonic with its head. It can then be hit again. After the second to last hit, it gains a new attack, where it lays its head on the ground and starts spinning (it cannot be hit during this). Soon it slows down to a halt. Then it can be hit for a final time, destroying it.

If Mechrane isn't hit when it leaves itself vulnerable for the first attack, it reels up, locks in on Sonic, and drops the object it picked up. It repeats this cycle until it is hit.

If Mechrane isn't hit during its second/third attack, it again repeats the first move.

2. Heavy Plow
A boss that is invincible from the front, as it is covered by several reinforced metal plates. DB once again pilots this. It plows in a linear fashion, back and forth; this is it’s only attack. If Sonic lands in the plow, the miniboss will throw him up into the air, and when landing deal damage.
3. Drillerdroid 2.0
A further upgraded member of the Tunnelbot line, and a more powerful version of Drillerdroid. Has the same heavily guarded armor as Drillerdroid, but looks like the first Tunnelbot from Sonic 3. Uses generally the same attacks, but can now burrow into the ground and burst out, as well as attack from the side with the drill head-on.
4. Director Bot
Can only throw his clipboard at you, as it is now defenseless. One hit to destroy.

Miniboss 2: Security Force
A somewhat average-sized robot. It has a circular body with a visor as the “eye”, but has a body similar to Metal General from Kirby. It lacks feet and arms, and has three circular orbs around it.
1st Phase Attack Pattern:
The robot will always start by firing three lasers, going to the bottom-left of the screen and firing up. It can be hit, provided the player is quick enough. The boss will then swoop from side-to-side, dropping the three orbs. These orbs are bombs with a large radius, but they can be spindash’d to repel them back up at the boss. It will then begin to emit sparks of electricity, fired in 8 directions. After 4 hits, the second phase begins.
2nd Phase:
Security Force becomes far more aggressive and begins to malfunction. First, it flies to the middle of the screen and begins to rotate, firing lasers in 16 directions. It then swoops to Sonic in an attempt to hit him; Sonic can get a hit off here. Security Force then begins to spread out and rotate the orbs around it in a very fast motion; the ring of orbs contract and relax constantly. Hitting one hurts Sonic. Several hits can be scored here. Finally, the miniboss will fly up, and fire one huge, discontinous laser and pan across the screen (similar to Barrier Eggman). It then randomly repeats attacks from its first and second phase. Takes 4 hits to defeat.
3rd Phase:
After critically damaging Security Force, the final phase begins, in which Security Force attachs itself to a wall. The wall powers up, and two giant hands appear. The hands have four attacks.
Sweep: One hand sweeps across the stage, and attempts to grab Sonic. If he is grabbed, the hand goes up and offscreen. It then returns with a gigantic slam (similar to Big Arm’s attack). The other hand follows.
Clap: Both hands track and lock onto Sonic, and very quickly clap both hands together.
Slam: A hand appears in the air, and with an open palm slams into the ground. The other hand follows.
Punch: A hand appears on the side of the screen, charges, and sends a reasonable fast horizontal punch. The other hand follows. Sonic is knocked back greatly by this attack if he is hit.
4 hits per hand.

When Security Force is defeated, the wall explodes, and the facility begins to collapse-- again, similar to right after Barrier Eggman is defeated. Falling objects appear and the ground begins to rapidly collapse. Speeding through this section leads to a loop transporting, leading to the boss room.

Boss: Gravity Crusher
Takes place on a very long platform.
A heavily armored goliath of a mech. Makes quite the entrance by slamming down on the ground, which is an instant kill if not dodged. Piloted by Eggman himself. The boss’s armor is impenetrable, but its head is vulnerable.

Similar to Egg Golem from S3K, but has an appearance more like one from SA2.
First Phase
The fight begins with the slam down. The boss then chases Sonic at a pace enough to keep up with the blue blur.
At any time can Sonic board the boss’s hands and attempt to hit its head, but if Sonic stands on it for longer than 3 seconds, he will be flung off ahead the Crusher, who can run over him following the attack.
It has 5 main attacks.
1. Egg Crusher will boost across the screen. Sonic must board its hands, and manver behind it. Hitting the mech is possible here. This is always its first attack.
The boss will then do one of two attacks:
2. The boss will appear at the side of the screen it boosted to so that Sonic is now chasing the mech. It will fire it’s hands offscreen, then return them.
3. A shadow will appear following the boost, as the boss is about to land on Sonic once more. This, like the entrance version, is an instant kill.
After doing one of these attacks, it will then use its fourth attack:
4. Panning lasers: The boss’s eyes begin to glow, and it fires lasers that scan across the track (similar to Egg King’s laser attack). The lasers leave a firey trail, so timing is crucial.
The final attack incorporates the boost attack, and then:
5. The boss begins to rapidly slam its hands on the track, creating shockwaves. It finishes with one dual-handed slam, which is another instant kill if Sonic is directly under the slams.
Takes 8 hits to defeat. When the boss is defeated, the second phase begins.
Second Phase:
The mech derails off the platform and falls off, seemingly destroyed. The boss music even stops. Sonic runs forward to a pitch-dark room, but just as he reaches the end of it the boss lands once more. This time, it is critically damaged, and has lost much of its armor; as such, the stomp will not instantly kill. It then jumps to the background, and the room lights up, revealing a factory room where Sonic is on a conveyor, as well as there being one on the ceiling. Behind him, giant crushing jaws are revealed, and the treadmill activates. The Gravity Crusher lands in a machine, and it begins to pilot a giant machine. Random objects are on the treadmill, which serve to hinder Sonic and get him between the jaws, which, again, instantly kill. The background mech is simple yet deadly; it has a series of pistons which it can use to hurt Sonic, and the pistons will occasionally burst from the background and detract when hit. It’s second and last attack reverses gravity, placing Sonic on the conveyor above him. The purpose is to throw Sonic off and get him to fall into the crushing jaws. When the pistons are hit 8 times, the entire mech is destroyed, and Sonic is ejected out of the room. Act 2 ends with the goal on a falling platform, and transitions into the next zone.