dear DEV, if you can read this, please considere the following:
about gameplay: we all play a counter strike or call of duty, no need to make an invasive sign that remind you how to human.
if you want to add a tutorial you may want to add a partner that give you directions or better tell you things like, if you dont cover properly you will get shoot or something. also some guide will help a lot like, watching a menu with a map and locations (beside the mini map) with pics of the entrance maybe.
about the sounds and voices: they are too loud, both could be softer, no need to invade the whole moment.
about some details:in the scene of the rescue, i like the keep it quiet thing, it feels autentic, but other details like the "camera interface" having too much stuff on it, or that in some point he was whispering, but then he keep doing that when one believe that he was talking to himself.
but those are some personal notes of a humble internet citizen, i understand how much developing a good game takes, and i believe this could be a good game.
i wish you the best of lucks on this proyect DEV.