Fun game, but a few flaws.
First, it borrows pretty heavily from other popular games of the genre. It's not a blatant ripoff, though it first seems that way, but it'd be nice to see a little more departure from broken ground.
Second, it's a bit slow. It's not so bad with the first sight, but the improved sight simplifies it so much that it's mostly waiting.
Good game, though. Good concept, and decent delivery.
Better than Achilles, but that doesn't say much. I like the elements of gradual improvement, but the game still suffers from many of the flaws Achilles had. Sometimes it feels more like I have no option other than to just throw myself bluntly at the enemy, especially with bosses. Several enemies on screen at once completely overwhelm, though not as much as in Achilles.