Enjoyment: Good, I liked the game idea and progression.
Presentation: The palette of colors, transitioning from purple to red, gives off a good vibe, but the UI fonts? Why don’t you try using pixel art fonts? It would be cooler.
Concept: Cool and creepy, I liked that! The pixel art and sprites were well-fitted.
Use of theme: We don’t have a direct villain; we maybe have some objective.
Use of prerequisite: OK.
Controls: The range to drain the blood sucks sometimes.