Decomp: https://github.com/Rubberduckycooly/Sonic-CD-11-Decompilation
Mods used:
Sonic CD Separated Past Themes - SoN1c2001, US Past Themes by KingMeteorStudios
Higher Quality JP/US Music Mod - Darkskull Dawn Zenith
Restart Special Stages/Time Attack - MegAmi
1996 PC Title Screen - RetroForever
Zone 2 is better than Zone 1, thanks to a much easier to find Transporter (right at the beginning!) and some more cooler gimmicks. Time traveling here can be difficult, but you can do so easily by spin dashing off the top of the device at the beginning so it doesn't rocket you off of the cliff. You can then find the Past sign right next to the Transporter and also have plenty of room to time travel off the cliff.
The Metal Sonic Projector is right under the start of the big spinning poles area. It's a bit tricky to find, but keep bouncing around there and you should fall right on top of it.
At this time, SuperFreaksDev has 531 views for Sonic CD spread across 43 videos. The game makes up 1 hour of published video on his channel, roughly 2.40% of Sonic CD content that SuperFreaksDev has uploaded to YouTube.