Really fun game. Some of my suggestions are that: The "people" could be improved so they look soldiers or something, you could add a cross hair, you could improve the graphics of the guns, you could add different modes, you could add difficulties, new maps and more guns. I hope you include some, if not all in the new version if there is a new version. I still really liked it and liked how you can only see the enemies if they're in your line of sight. ;)
P.S. this is just some random idea but would you include spontaneous combustion in the new version if there is a new version?=3