Hey there and thank you for joining!
1. Rule #1 states "Development on contest entries MUST be started after the beginning of the contest (June 21st, 2021)." That means that you cannot have worked on it at all. So no, you cannot remake a game you've already started, because something that was already made (story, character information, even formulas or hand-drawn maps...) would already exist.
2. Dev streams and Dev blogs are fine, no worries. We only mean the actual, playable game.