The game seems really fun, I like the concept of being the impostor amongst a group, but it also has been done a lot. The art and sound design is also really great. The game looks amazing and the intro sequence is also a really great touch that helped explain the game.
There are a few problems though, mainly the fact that I don't exactly know what I'm doing. There's no controls panel in the game so I was having trouble finding out what I could do, and in the end I kept dying from running out of time since I didn't know how to pickup the little blood drops. The other thing I often died to were the clones of characters that would appear from offscreen once I killed that character. They were somewhat difficult to avoid since there's now way to sneak around them and they one shot you if they get too close.
Overall, the game looks amazing with the art, sound, and intro sequence, but is difficult to get into without any kind of tutorial. Once a tutorial is added and the major bugs are fixed, I think the game would be really great, and it's really impressive that you managed to come up with such a great game in such short notice.