C418 music is so professional and AMAZING because it has algorithms that make emotions not only using notes but he uses sounds effects of real life like bells, doors, wind etc., to make a more familiar, realistic and emotional music that can connect to you in a beautiful, creepy, suspense and sad way just like composers like Han Zimmer that does the same thing.
This music also is not like when you are in a battle but you are listening peaceful music, he always uses notes and sounds to make it sound mysterius, action and kind of peacefull for a more general complex music.
The music of C418 is sophisticated because it mixes the sound effects with notes and this is not an easy work because the ‘’bell’’ sound is in D mayor but the music is in D minor, so he has to mix in a really complex and exact way every note with the sound effect.
For example this piece https://www.youtube.com/watch?v=DwXtbA64lHE
this piece starts with just creepy sound effect thats is in a minor note, thats why it sounds creepy, the sound effect goes loud and soft causing suspense, then we hear the first note thats in minor (Ds) and from there are just are 3 notes (Fs) (E) and (Ds) all in minor just like the sounds effects.
In this other piece https://www.youtube.com/watch?v=4i0d6CPLSGo
we can hear like random minor and mayor notes then we can hear mayor notes and then we can only hear minor notes (This are sound effects) then we can hear the music and is there when we can here the melody, thats is where we figure out that they were not just random notes, because you remember they were just random minor and mayor notes with not tonal relation but here we can hear a kind of a lofi-hip-hop music because the lofi is composed with lots of minor and some mayor sounding like sad peacefull and this is how this piece sound like Lofi piano. Piece - Peace XD
Thats why C418 is a so good composer. :D