Sorry, I don't entirely understand what you mean? Are you referring to the copyright information I included in the credits? That's just the year those resources were produced. When I purchased the rights to use them it is technically part of the EULA to use that exact verbatim of copyright wording.
I did wait to start making the game until the allotted day (actually almost the next day, because it took me the whole first day to write the plot out). But the engine I used was created in 2012, the music in 2015, some of the graphics in 2011. I mean, Unity was released in 2005 - but I don't think using it disqualifies you for the jam. ;)
I'm glad you liked the story, though. =D