Despite being such simple games, Panda Adventure and Rings has a lot more going on in its ROM.
Panda Adventure[]
Unused Graphics[]
The bobcat enemy in the game was planned to have a longer tail. The fact the extended tail doesn't connect properly probably means the tiles for it were ditched early.
The Rinco logo (with palettes assumed) can be found here. Apparently, Ramar International was supposed to publish Panda Adventure and Space Shuttle Exploration at some point but it never happened. Unlike Space Shuttle Exploration, there's no unused intro for this game.
Unused Music[]
These can be found by going to hex address 0701 in FCEUX and setting it to the correct value below.
23 - Rinco Fanfare A fanfare that sounds like the one used for the copyright screen in The Dragon.
24 - Unknown Track A weird sound effect; it's purpose is unknown.
Rings (Super New Year Cart 15-in-1)[]
Removed Title Screen[]
Rings was supposed to have a title screen but in the Super New Year Cart 15-in-1, it was completely removed. To access it, change the value in hex address 0007 to 03 while on the select screen.
Unused Music[]
These can be found by going to hex address 0701 in FCEUX and setting it to the correct value below.
Rings only uses 4 tracks on the Super New Year Cart 15-in-1 but it has a few more tracks that have gone unused within its ROM:
20:
Was originally used in Titenic and Harry's Legend.
22:
Unknown; wasn't seen in another Hummer Team-related game.
25:
Resembles Ottowan's D.I.S.C.O. This was used on the Samuri 60 in 1 Plug & Play Console.
26:
Unknown; wasn't seen in another Hummer Team-related game.
27: Unknown; wasn't seen in another Hummer Team-related game.
29: This was used for the Drumfire game that appears on the Samuri 60 in 1 Plug & Play Console.
2B: Resembles a track from Dwango5. This was used for the Cute Heads game that appears on the Samuri 60 in 1 Plug & Play Console.
2C:
This was used for the Samuri 60 in 1 Plug & Play Console's intro.
2D:
Resembles a track from a shareware game known as Uz. This was used for the game title Samuri 60 in 1 Plug & Play Console.
2E:
Wasn't seen in another Hummer Team-related game but it resembles Jethro Tull's Aqualung.
2F:
Unknown; wasn't seen in another Hummer Team-related game.