I'll be talking about the bosses and stuff so..... SPOILER WARNING.
I was utterly blown away by this game, the amazing grafics, music and gameplay make this the best game i've played on newgrounds so far.
The bosses telegraph the attacks theyre about to use perfectly, but doging they're attacks and knowing they're attacks are two very different things, making them all very challenging.
The final boss was definitely my favorite, with his vast array of attacks and his defeat by the hands of Fregg.
The final bit of the game seemed frustrating and too hard at first (Why don't I get a check point??!! I only get one life!?!!) but it is so satisfaying when you beat it (Fuck yeah!!!, holy crap its over?)
I have no complaints about this game.