They are royalty free assets so I can't take credit for them, I used Quaternius and some poly.pizza, they are amazing for jam assets. I did the sound effects and art for the paw prints. The bells ring when you're near a track but that radius is larger than the one that counts when you collect it -- so I think that's tripping some people up.
Thanks so much for taking the time to give me this feedback and for playing my game!