4 whites and 1 black
I like the idea; being able to toggle the different tracks. They all overlap nicely, so you get to listen to some good music and mess around with sounds in a fun way. It seems some layers play louder than others though, and volumes out the other layers. Still great though, and a lot of variations to chose from. Nice work!
3 RED 1 White and 2 Black
Does what it should, pretty well.
The single Blue is kind of overwhelming. A great game, but some of them are really quiet or grainy and have very little to add, while others have multiple loud tracks.
I did like this one: