Very nice game. It felt very polished and fun!!
I do agree with what Stanley said. Having to engage in in a gun fight was defeated the purpose of stealth. I was playing on a touch pad thou. But a good workaround to keep the rewind necessary is to have one hit kills with a melee attack. So those enemies that you can attack from the back can be easily killed and the gurds that are usually in corners would need to be lured out with the rewind.
Eitherway, I really did enjoy it!!. Nice job!!