Well you don't need a mouse in Touhou, it's just arrow keys, z, x, c.
How does the mouse work in R&S? left click primary, right click secondary, what's special and defensive?
its just mouse movement of your character to the position of your mouse, as in youre directly moving your circular hitbox
you just dont use arrowkeys to move
i bind primary m4 secondary m5 but i played z x c for a while too
