While I'm biased against stealth mechanics in games, I found this one very enjoyable! I particularly appreciated the character design and art. The timing for stealing the cookie was pretty tight! I also liked the concept of loot slowing you down. My only design concern, which might just be a personal preference, is enemies turning back instantly at the end of their patrol. Maybe having them stop for a little bit before turning around would have it a little bit easier to figure out when to move, or telegraphing the turn a little bit. It was also a bit difficult to move through doors without being able to see the floor below. Although it seemed like there was a bit of a grace period after going through doors, that was nice and helpful.
Really these are just minor nitpicks: impressive entry with great presentation. Amazing work, keep it up!