It's a bit jarring to hear SotN's voices used again. People use those ones a lot. "Castlevania: The Bloodletting" was a fan game that was a bit notorious from taking voices from Richter, Dracula, AND Alucard for one character, and even using some Saint Germain clips for him. I could provide you with some other voice files to help individualize the character voices if you want.
Also, in the final version, will those falling snow boulders deal damage? If so, I think it would help if you included a circular shadow underneath them to help you know where they're going to fall, so it's easier to dodge them. As it is now, they might be a bit unfair.