I don't often change my ratings for games, because I like to think that after an hour or so of play I have a pretty good indicator if a game like this is going to be worth my while, but the artificial difficulty spike in the third boss as well as the standard play mode is out of control. 3/5, and all 3 of those points are for Enhanced Mode, which should've been the entire game as far as I'm concerned.
So, after 10 tries the glitch which will occasionally freeze a monster in place, instantly killing it, apparently instantly froze and killed the final boss for me. Not sure how I feel about that. Really not...
You know, even though it's truly and frustratingly difficult at times, it's an interesting concept for a game: See how fast you can develop Tourette's Syndrome.