This is a lovely little experience! The combat is a nice way to add a bit of skill execution to a turn-based system, which definitely made the fights less tedious(Hardmode was a nightmare, though). Getting good visuals in this style can be hard, I know, but you definitely pulled it off, even with the odd walking animations. I’ve enjoyed every track, especially the final boss theme.
It feels like a miniature version of something truly amazing, like a Deltarune-lite(and I don’t just say that because the setting reminded me of a dark world!), if that makes sense. I can imagine, years from now, seeing a video essay about how Crystal Depths is one of the best Indie RPGs ever, mentioning that this was the original version of it, and that it still holds up! If there was more for me to sink my teeth into, I could definitely see this becoming a hyper-fixation for me!