I wouldn't touch the core idea because it's actually quite good, but I would improve the graphics. The graphics are a major drawback in this game, but otherwise, it's decent...
Well, if the game needs its graphics improved, then there's essentially nothing else that needs to be changed, because graphics are a subjective concept.

Барон "Vampires"
Отдай свои прошлые сны,
В сомненьях себя обрети,
В бешеном танце душа кружится!
Не думай, что будет потом,
Здесь и сейчас мы живем,
Стань хоть на миг сам собой, слышишь!