SPOILER AND THEORY, DON'T SCROLL IF YOU DON'T WANNA BE SPOILED!
Aside from the VERY obvious and entertaining jojo reference, I'm beginning to suspect that dave might be based off from Natsuki Subaru, as Dave... Metem-cise? Lets just call it reset, As dave reset and type in the password, I noticed how more and more messed up his senses become, Just like from re: zero this includes the new update, From where he found out about sal, Dave started to hear his dads voice telling him to give up, So maybe, just maybe, just like subaru, Dave struggles from connecting what happens in different timelines and different posibilities, The only thing that's different is that dave isn't the one to die in these routes, But his friends. The newest update lead me to believe this because of the new password, especially since I'm addicted to the matter of alternate timelines and possibilities, like in undertale and re: zero, This alone is why I love this game and I hope to play more of it in the future! ^^
Sorry for the babbling from this anime weeb and VN lover XD
(Is grizz a weeb I wonder?)