Thanks for the feedback! There are still many things to adjust, so it is possible that the movement will end up being modified slightly. Anyway, in the options you have "camera lag". If you deactivate that option, you may feel the movement more similar to that of Kula World!
It is true that the volume is not saved well. It's already solved for the next update!
On the YouTube channel I usually post videos with previews of what will arrive for the next update, in case you want to take a look!