Bench-kun's C3 Single Level Collab - Sublevel

i'm a bit confused. what does this mean? i can get an idea of what it means, but i just want to make sure i understand.

Hack Source:smwc.me/1584567
Filename(s):📚 c3 collab things.zip
💟 bench-kun's c3 collab thing
Categorized:💞 Collaboration
Produced By:Minish Yoshi
Approx Date:2021-07-04
Binary Size:16 Mbit (2 MByte)
Apply Patch: BPS (166 KB) IPS (382 KB)
CRC32 Check:636A6936
SHA-1 Check:27af201889edccd433e0f7a1abf5974322d972ff
Header Info:@32K: 16Mb(+16Kb) LoROM+SRAM V1.00 L01-NTSC/US 0F3B/F0C4
Other Stuff:
Lunar Magic:Version 3.30 🔓
Level Edits:3 (est.)
First Level:04E sublevel
Level Images(are auto produced and may have errors!)

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