I was just trying to keep a 2 month timeline . I think either 3 week deadlines or adding two additional 2 week deadlines would work well (keeping the total time around 3 months).

Actually, personally, I like 2 week deadlines as they keep it interesting. Of course, that means the judges would have to work too

As for theme, I like Arcade. Since I like Retro games I can easily fit the Arcade style