I liked being the invisible enemy itself instead of being a character fighting against one. With that said, I didn't think the game worked at all. I most likely didn't understand something crucial, but the stealth mode didn't seem to help me at all. If I stood still, the meter at the top went down, but If I entered stealth mode, it stopped. How does that make sense? Shouldn't the awareness of the target be lower when the enemy is invisible? The movement was very slow and sluggish as well. I didn't manage to beat the game.
Please reply to me if I didn't understand the stealth mechanic properly, so I can replay your game.