Ah, allow me.
#1, going down, this is an onomatopoeia. Its purpose is to help the reader hear the sounds of the words they reflect.
#2, this is a metaphor. Its purpose is to illustrate something by comparing it to something else.
#3, is a simile, it compares things with like or as.
#4, is a simile, comparing things with like or as.
#5, is a simile, comparing things with like or as.
Hope these are right