This is Madness (not related on any way to Sparta)
And since it's a Madness game it should have more shooting in it, that is to say it should ACTUALLY have shooting in it.
Judging by the name "Infiltrate" I'm guessing you are planning to make a stealth game, in that case you should HAVE stealth.
It's not much of a demo since a demo is a demonstration of gameplay mechicanics and artwork. Try making a demo when say... you have made the first level (unless that's what you did and the game consists entirely of walking around) and I'll be able to give any helpful info, but until I even have a clue what kind of game you're actually going for there's nothing else I can say other than "I was expecting GAMEPLAY".