Would it be possible to add a large button off to the side of the bar in the current minigame to press in addition to the bar itself? Partly to make it easier to play on mobile, but I think it would be nice to have in general. Possibly as a chooseable option just in case someone really wouldn't want it for some reason?
In my experience, it's mostly fine, outside of it being awkward to hit the bar in the minigame (And I sometimes miss on desktop too if my mouse drifts a bit too far), and scrolling the inventory screen is awkward - no scroll wheel means that you have to actually drag the scroll bar, which is tiny on a phone screen. I guess that could be fixed by letting you drag on the inventory screen itself, but I consider that to be a pretty minor issue.
Another minor suggestion for both desktop and mobile QOL would be to allow advancing the dialogue boxes by clicking anywhere on screen. But that's another thing I can live without.