It may well be that it ends up being a game in the future, however, what you submitted to the jam was not. exploration games can certainly be games, but your submission doesn't even have exploration. It's just keep clicking for the next line of text until the end.
The major issue with it that makes it not follow the theme as outlined is that the player does not know from the beginning what is going on. If the player already knew he was the murderer of all those people but the character didn't know, then it would have been fine. But the player doesn't find this out until the end when the character finds out.
I do wish you the best with developing it further, it just doesn't fit in this particular jam.