New player, so I may not have all the info.
When fishing the target button can "hover" in three locations, Left, Right, & Middle, & will always hover in two locations. When it can hover in M the only other hover location seems to be R. This means that regardless of the pattern R will always be one of the hover locations.
If this is correct & working as intended I would like to suggest an option to mirror the fishing minigame, so that it will always hover in L regardless of the pattern. A left-handed accessibility option.
