Thanks for the feedback! I had thought of adding something like that to the game, but I ended up discarding that idea since it would make rewinding less of a prominent mechanic. I play tested each level to make sure you could finish it without taking out any guards (except the briefcase carrier). A tip would be to alert a guard from one side of the doorway and be able to rewind to the other side. This should allow you to move through the doorway without even being shot at. Also take note of where they became suspicious of. That would be the last place they saw you or the last gun shot they heard. They will always move towards that spot without looking back until they arrive. Hopes this helps, and I will totally check out your game!