Sonic Blast: Part 5: Silver Castle Zone (Sonic)
The Silver Castle isn't really one of those medieval castles. It's like what you'd see from Wily's castles in Mega Man: A mechanical fortress, per the norm for Eggman.
This Zone is ALSO annoying because of the angles you have to go for just to hit its enemies without them hitting you. It also feels even more claustrophobic to move through without running into a hazard.
There are platforms here that also function as batteries to step on in order to activate some of the teleporters you will use throughout this Zone. You gotta make sure to find and use the right ones if you're looking for those Special Stage Rings. This Zone will have the last Emerald: The Silver (or Gray) Chaos Emerald.
You will also have to outrun giant spiked walls.
----------
The Act 3 boss can be approached with a teleporter as soon as you start on Act 3, but if you want to, you can instead first travel around the area to pick up Rings to prepare for this (presumably) last boss.
For the boss, itself, Eggman shoots lasers at you from above. Specifically, he shoots the lasers at the mirrors on both sides of you, which the bounce off and THEN shoot at you. You have a tiny window of time to effectively dodge this with a jump.
You have to beat the doctor at his own game, since you can hit him directly, this time. Using the wheel you're standing on, rotate it around by running on it to control another mirror that will send Eggman's lasers right back at him.
Which side he decides to go for is completely random. Watch his movements, and act accordingly beat him in no time!
----------
Now... you'd think this was the final boss. Right?
That would be true... but only if you didn't get all 5 of the splintered Chaos Emeralds, which again, has little to no room for any failure.
But for me, this just means I get one more boss battle before I finish this game for good. That will be in another video!