This game has so much potential to be a great stealth adventure, but there are a lot of issues in the difficulty department. The first thing I would mention is how it's difficult to tell when one of the guards is going to spot you, being crouched right next to them doesn't set them off, so it isn't easy to understand what will. One idea might be to implement a mini-map type of thing which could show guards vision cones, to make it feel to the player that it makes a little more sense when they do get caught. This was a great idea for the jam, and I never would have imagined a game about espionage would fit so well into the theme, but it really does!