I liked finding the “extensions” to the locations (such as deep forest), it helped spice things up.
I think most battles could be simply bypassed by clicking “explore” repeatedly, this way I was able to find 4 scales. Didn’t work in the underworld though, not sure if the chance is simply lower or you actually need to fight somebody.
I didn’t get the point of the city. There was a bit of dialogue but besides someone telling me I need 5 scales it wasn’t really useful to be honest. Given that apparently you can win by getting rich (at least that’s what the button in the dragon menu implies), perhaps someone in the city could hint at that?
Overall, nice job!