Soundtrack layering

I thought it was interesting how the feeling of momentum speeds up as the song progresses, because it keeps adding new instruments with variations of the original melody.

I like how the song gets progressively more complex as time goes on, with more sequences being added to the mix. The original repetitive sequence is the so prominent that it easily remains on the foreground despite the introduction of newer sequences which ought to change the focus (because they're new).

This is a great example of layering. Each individual part plays the same phrases mixed together, but the piece remains interesting by having presenting a new layer or taking away an old layer.

Aww, not L's Theme A? But this theme does do the complexity very well. I also like the explanation you give, which makes it even simpler to follow!