It's Floating Power Cell Area, Takes 1 and 2. Press the button in the bottom right to switch between Act 2 and a Beta version of Act 1 If you want to see the entire soundtrack so far (before each song is published to Scratch), here's the link to an album: www.bandlab.com/indymine/albums/75660385-8e16-ec11-981f-0004ffd34422
So it was 12 AM, and instead of going to bed like anyone else, I decided to make music for Sonic & Knuckles Expanded. And now here it is, Floating Power Cell Zone (NOT Flying Battery) in all its glory after staying up from then until 4 (and then some) working on it. I created everything in the song (except for 3 Channels ripped from the original song, being channels 0, 2, and 3). Oh also for anyone who wants to know, I used BandLab to make this. However, a few instruments used in this song aren't IN BandLab, so I just composed the missing instruments in another software, then imported them into the BL project as an mp3.