Hello there.
In order to unlock "better" interactions you must build some trust with them and increase your skill, after some orders new interactions with them will be open allowing to go further.
About the music, you are completely right, it was a big mistake i though, as that fluffy's entry was not a game and was published so early, that it was an asset released to use on the jam. My mistake entirely.
I've linke to fluffy's page already.