I think this was my favorite so far, everything was so well done. It made me want to do a speedrun! There was just enough variation in the timings/placement of goons to keep it interesting. It wasn't hard or frustrating, and yet it was just difficult enough to make me feel like a stealthy secret agent (and to make me think a bit). So I was very engaged. Awesome!
The only gripe I would have is the theme (failure) is a little weak. But the actual game/product is really great.