Really clever stealth gameplay, the addition of cough makes the player plan if they can take another step further or just make noise to gain some 'breathing room' (sorry). If you plan update further, I would suggest trying a version where the player does not have the option to cough, but rather it only triggers when the bar is filled. I say this because I was always coughing when the bar was starting to fill, so I never really got in danger really. Still, really creative and fun, nice job!