Just finished it in a bit over 2h. Gameplay was fun, although I would have wished for actual controller support. There is a good variety of weapons and augments. The spacing between saves is also pretty good. The early game was a bit too easy (I played on the mid-difficulty level). I only died a few times at the end (after defeating the boss of the red zone).
I couldn't read what the first boss was saying, because it was behind his health bar. The text at the bottom of the screen (new Items etc.) is a bit blurry, should maybe be scaled with nearest neighbor. In general there were some dialogs that were skippable by pressing one of the fire buttons and some where this was not possible. Also, I got stuck in a wall twice*.
SFX were good, music was pretty nice too, except the fighting music of the dark blue zone. That one I LOVED! Animations good, enemy design also nice and varied, interesting color palette. The boss fight where you get hacked was also really great, although the screen indicating you were hacked (tv static) was not as nice as the rest of the graphics.
Overall, great game.
* Red zone, if you number the map from top left with (0,0) and the boss is at (0,1) safe point is at (0,2), move right (1,2) then down(1,3). There I got stuck in the top right walls when entering that screen. I had speed and cloak augments, which might be necessary to reproduce.