SpongeBob SquarePants - The Krusty Krab
Resolution: Low
Animated: Yes
Superjump Compatible: No
Music: Yes (SpongeBob SquarePants SuperSponge! [PSX] - Cavernous Canyons & Acrid Air)
Two versions included: one with characters, one without.

Microsoft Paint
Resolution: Low
Animated: Yes
Superjump Compatible: Yes
Music: Yes (Waterflame - Jumper)
1.1 version included.

ChalkZone
Resolution: Low
Animated: Yes
Superjump Compatible: Somewhat
Music: No
1.1 version included.

The Mighty B! - Pier 31
Resolution: High
Animated: No
Superjump Compatible: No
Music: Yes

Fanboy & Chum Chum - Frosty Mart
Resolution: High
Animated: No
Superjump Compatible: Somewhat
Music: Yes

Back at the Barnyard - Farm Road
Resolution: High
Animated: No
Superjump Compatible: Somewhat
Music: Yes

The Penguins of Madagascar - Penguin Lair
Resolution: High
Animated: No
Superjump Compatible: Somewhat
Music: Yes

Fanboy & Chum Chum - Playground
Resolution: High
Animated: No
Superjump Compatible: Somewhat
Music: Yes

Jellyfish Fields - Night
Original Author: MugenJF
Resolution: Low
Animated: Yes
Superjump Compatible: No
Music: Yes (SpongeBob SquarePants SuperSponge! [PSX] - Jelly Fields)

la
Author: vance
Resolution: Low
Animated: No
Superjump Compatible: Yes
Music: I guess...?
Additional Notes: This was based off some stupid in-joke that ran between me and him.
Depending on your point of view, this is either an obnoxious stage or a blessed stage.

Pepsi Hell
Author: vance
Resolution: Low
Animated: No
Superjump Compatible: No
Music: Yes (heavily bass-boosted version of Pepsiman theme song)
Additional Notes: This was also based off another in-joke that ran between me and him,
but to a lesser extent.