I'm wondering if A click and drag is considered multiple actions?

Theres only one mouse button, but does moving the mouse during that one click make it technically two?

Moving the mouse is usually considered as at least 2 buttons (X axis and Y axis). Many games already use "mouse movement + one mouse button" and it wouldn't be very interesting like that.

BUT if you have an unusual control idea, well, feel free to try it, even if it implies moving the mouse.

The main point is to make games!