This game deserves perfect ratings for Concept and Use of Limitation, as it delivered these aspects impeccably in my opinion. Not to mention, it presents a leaderboard for the players to compete with.
Simply the idea that a vampire is inside a colossal snake's stomach is very creative. It also makes the blood flood and blood leaks plausible, and now you have these two factors that would risk the player's health as the game progresses.
Great job for such a polished game given the time and theme constraints!