The games has a 4,5/5 score on Amazon Japan, which is pretty great actually. It doesn't have a lot of reviews however.(since the game will flop hard due to his amazon exclusivity).
A friend translated me some of the reviews, it says that there is the same gameplay feedback as Ninja Gaiden, a good balance between shoot and close combat, a good freedom of mouvement and the games seems to be challenging in the good way. On the cons side, the game is incredibly ugly.