First off, it is criminal that this game has so few ratings! I landed here from the screenshots page, but you need to go review and post on some other jam submission pages ASAP so you can get some eyes back here. There's a lot to like and your efforts deserve recognition.
First off, the environment and decorations were really fleshed out. I was sold on the premise that I was swooping in to nab some cookies and then high-tailing it out of there. The fog of war effect was also well done. There were a few inconsistencies on what objects were affected or not, but overall good. It would have been really nice if the camera and guard vision cones had a similar effect. I was afraid to get to close to walls or doors whenever the cone was spilling through.
The cookie mechanic was also felt pretty well balanced. A well-placed cookie could give just enough time to delay a sweeping camera or a vigilant guard from locking you out of the collection zone. The cooldown also made it so that you really did have to zip by quickly in order to make use of it.
The UI was also working really well. I felt like I could navigate around and choose the levels without any issue. It's a shame that the final level win condition wasn't working, but I suppose throwing the cookie in the back of the truck when you have all five is enough proof that you've won.
Good job! I had fun slinking around for these cookies.