The low poly artstyle looks great and everything looks very polished. As pretty much everyone here, I also love that the characters gets bigger and how that limits the usable paths, very creative design!
Picking up a biscuit should have some feedback, I was confused at first if it worked at all until I noticed the biscuit in the characters hand, and later I ran back a bit without a biscuit because I hadn't noticed that I was too far away from the cookies. Maybe a little particle effect to communicate that the interaction was successful.
It was a bit unclear to me what the condition was for being caught, but I think that was actually good. It was clear enough for me to eventually win, and it made it more tense, not knowing exactly how far you can go. Great job!