I recommend this game primarily for character action fans who don't mind something cheaper and with more of a novice's touch than they're used to. Certainly do not go into this game expecting Devil May Cry or Bayoneta.
The graphics are not outstanding, but they're servicable and a lot better than I'd expect from most Indie developers working with 3D.
The combat arenas are not very diverse, in that they're all the same, a giant circle with a number of different background locations to add a feeling of progress, but in a way that helps the game. You'll never find yourself fighting with bad level design, and the format of a pure circle is perfect for what the game is all about, pure unadulterated combat.
The AI of the game has a mild Platinum touch, specifically that enemies will not attack you if they are not onscreen, a trademark of Character Action games from the Japanese developers Platinum Games.
Otherwise AI has a problem in that all enemies follow the same movement pattern, that is they walk towards you in as straight a line as possible, then start to circle you once they reach a certain proximity. This leads to a problem where if you run away for enough time, all the enemies bunch up into one big clump, which is a problem as you are either looking at all the enemies, or none of them, making you either in for a real pounding from every enemy or completely safe.
Enemies have plenty of variety, starting off with basic faceless soldiers, then getting two Elite variants, then the introduction of more enemies that also get more complex and tough Elite variants. This leads to there being plenty combinations of enemies to keep combat interesting, you won't find yourself fighting the same encounter over and over.
The game is entirely devoid of a soundtrack, which does ruin the atmosphere a little, but perhaps no OST is better than a really bad one as is common with Indie Games.
The story is barebones and merely there to facilitate the existence of combat.
The game is very short, I have clocked in about 2.3 hours as of writing this, and I believe myself to be struggling with the last boss of the game. Though I am at the end of the story, the existence of an upgrade path, and I believe a New Game Plus type feature, in addition to the game's difficulty and pure focus on combat gives it a decent amount of replayablity.
Regarding difficulty, I have played the game on both Easy and Normal difficulty, I've found the game pretty challenging and enjoyable without being too frustrating, even on Easy difficulty. Bosses are somewhat reminiscent of Dark Souls, they feature large swings, and a somewhat difficult to predict movesets. Will the boss swing once and leave themselves open for a punish? Or will me attempting to punsih their swing cause me to eat a second swing? These are the kind of things you'll have to cope with if choose to play this game.
On the whole I definately recommend this game for action fans, so long as they're fine with playing something with little to no budget and an indie team behind it.