Using Tails to fly, you can get up to a path that seems to be meant for Knuckles, where you go up some of those steep hill pulley things that were in S3... or you can bounce across the upper left and loop around to the other upper path... actually there's like, a whole bunch of upper paths... welp, I just got bounced onto one of the top paths...
omg these teleporting laser firefly things... so annoying when they track directly ontop of you... oh and there's enemies that go in and out of the background... 2.5D gameplay elements like in Kirby's 3DS games.
And armadillo enemies that you bounce off of when they are rolling around in a ball... direct DKC influence.
This is officially my fav level now. and my fav Sonic game...
Sonic destroys a projector that shows Metal Sonic beating up on some poor bunny... then all the animals escape, and Metal Sonic shows up for real.
Hmm... okay so I can't attack him, I guess it's one of those "race" bosses, like Sonic 1's Labyrinth Zone boss and Sonic CD's Metal Sonic race... but Metal Sonic follows you around and attacks you while you are running through the level... kinda like a Shadow battle.
Oh wait that's only the first phase... once you get to the end, there's this big machine with Metal Sonic's face on it, and he uses it to summon a bunch of mini-Mecha-Sonics at you, that act just like the classic S2 boss, but they're really weak normal enemies that die in one hit now... but wait, I just kept on fighting them for a long time, until I slipped up and died... Maybe I'm supposed to hit them in their ball state so that they hit Metal Sonic?
Even knowing that, it's not as easy executing it as I thought... I finally got the timing down for how to knock the little sonic into Metal Sonic, but then Metal Sonic likes to shoot his projectile RIGHT when and where I need to jump.
Okay I got the hang of it, not that hard... but oh wait, that's still not the last phase!
Another run while avoiding his attacks section... Then you run while avoiding a spike wall and here you finally get to attack Metal Sonic directly. This part is pretty tricky, but I found eat easy to always pick a ring back up and outrun the spike wall...