personal opinion, its too dark to see.. even when my phone set at full brightness.
The autoshoot needs more tuning.. specially the shotgun firing at ranges it cant even reach.
The graphics are great and the music is just right for the feel of the game.
I got mixed opinion on the slow motion tho, its great and all but it kind of kill the buzz sometimes, like when kiting enemies then ypu get slow motion and lost track of surrounding obstacles... Maybe its better for last kills of a wave or something like that.
Still a great game tho, and lots of things to explore here.. weapon, agents, levels and reaching for top scores.