You're absolutely right. I call this 'unintentional horror.' I'm thinking of ways to polish it after the jam. One idea is that I could change the walls so that it actually looks like the Backrooms, lol. Originally I did intend for there to be an item that would teleport you directly to Harold, but that was slightly beyond my paygrade.
But as for why I forgot to make it a good game, it's because I made this on a bloody minded whim, with a very limited time frame.