There’s a splash ofUndertale’s crackpot experimentalism to the writing and certain battles, as well.
Those are big comparisons to invoke, and I don’t expect Crystal Story to measure up to them.
It looks like there are Mode-7 style airship sequences in there, too.

The mechanics are a mixture of action-RPGpuzzling and turn-based skirmishes on a smaller screen-within-the-screen.
It’s also surprisingly creepy.
Seems very promising - I just wish it had a sparkier name.

It’s not even the only RPG on Steam called Crystal Story.