Thanks for playing! Same! Greedy books kicked my butt for a while.
So you're having issues on the level with 999 kills. Village right? You should be able to run through that one because the door is open at the end. You don't have to kill anyone... Only a monster would ;)
I didn't do the greatest at explaining all the systems. The 1 (or 999 kills on one level) is the number of kills you have to make as the monster each transformation or else you get hurt. Anything over that is excess and corrupts you. The more corrupted you are, the slower you move.
Another things is that when enemies are investigating you, they slow you down. Walk (try to act normal) and they'll stop investigating.
Good luck finishing the game! There's one level left, and then the ending. Let me know if you still have issues in Village