The short answer is that you don’t need to do anything. PupPod is based on the principles of operant conditioning and positive reinforcement. Even though it looks like your pup is just getting lucky, they're actually learning through trial and error. Over time, your pup will learn that rewards only come if the toy is moving after the treat sound and your pup will become more efficient to touch the toy after the treat sound plays. It might take weeks or months for your pup to figure this out, but be patient. They will get it with enough practice and in the meantime, just enjoy watching them have fun.
If you are looking for more detail, please read this blog post.