Too laggy enemies, and needs more variety in upgrades, like an extra weapon or something and ability to downgrade stuff. I found myself in a situation where i couldnt hit anything because my range was terrible. I was like level 10 in forward fire, and i could only hit enemies that was like 10 inches away. 3/5 because of the game keeps spamming you with swarmer generators.
Title music is a ripoff from Flash trek: broken mirror. Buggy, confusing. Why not just hands of war? Its a lot better. 2/5. Cant believe this is on the top of the list.
Also, if you think it is too hard, try PAYING ATTENTION to the instructions. It clearly tells you to use Z for sprint and X for invisibility. Invisibility has saved me a couple hundred times now. And, what are those guards carrying? A freakin Uzi?