It was really fun. 
 
The graphics were really good. 
 
The music was parallel with the atmosphere. 
 
I do not see anything wrong with the game, yet the demo was very short. 
 
The only problem I see maybe happening is it getting repetitive, but even in the short demo I unlocked 4 weapons and fought 3 amazing bosses and a couple mini-bosses. 
 
I would keep my eye on this one if I were you.

A lot of people commented on the weirdness of the game but...it just seems pretty normal to me actually. At least that's the impression I get from the demo anyway.

I played the demo too and it didn't feel too short to me, but maybe after a while this game may become somewhat repetitive, although that might just be something I find inherent of the DMC-style hack 'n' slash genre. However, in the time I spent in the demo the combat was fun, the graphics looked good and the game had a brilliant sense of style.

The scoring system is cool.