So it seems like you including your Unity project in the file. I don't recommend you do that in the future. I don't mean to echo everyone else, so for future reference, you can create an empty folder on your desktop and set the file location for your build there.
Now about the game, I've played with toys like this when I was a kid, and I think it's a really neat game concept, especially because you're able to expand upon it, which you do with spikes and the holes in the wall, which I think is pretty cool. Definitely can be expanded upon further, I had a fun time, I definitely think it'd be super fun to play more levels with more mechanics, but this is really good. Music and visuals are great. I did run into a bug where my ball got stuck inside the mound in level 2.