Cool game! You're off to a great start, and everything feels quite good. It would be nice to have some variation in how the "observer" reacts, for example if you're in full cover the whole time it doesn't even stop to look for you but if you're near the edge or just barely make it then they look around.
It wasn't super clear how to get past the sponge/cookie thing at first even with the initial tutorial tip. A little bit more of an immediate reaction like shaking or a sound would have helped I think, or maybe having the visual animation oriented more forward than downward.
Great work!