Have you considered adding a "ball dropping into the hole" animation? In the video, it looks like a new level is loaded as soon as the ball and the whole overlap to a sufficient degree. I think from a user's perspective, it would be much more satisfying to somehow see the ball go in. It would give you more of a sense of achievement before the next level is loaded.
I also noticed that the collision detection is not always perfect. Here's a screenshot from one of your videos where the ball is rolling over the side barrier: https://imgur.com/a/2tW1EOK
Have you considered adding a "ball dropping into the hole" animation? In the video, it looks like a new level is loaded as soon as the ball and the whole overlap to a sufficient degree. I think from a user's perspective, it would be much more satisfying to somehow see the ball go in. It would give you more of a sense of achievement before the next level is loaded.
What do you think?