Code Breaking Competition 2.0

[Nia M]

It was the whole rythym thing that had me stumped initially - I kept getting confused by how one of the letters seemed to have two possible letter values.
Then I spotted how the last three characters were 'qg$' and since q=' ' and $=a, and there's no actual two-letter word (that I know of) that ends in a, I tried reversing the sequence. Then it fell into place