There are a lot of different styles in bunnyhop. All movement styles can be combined with Auto or Scroll, however not all styles are usually played on scroll.
Scroll = use scroll wheel to jump
Auto = hold space to do a perfect jump automatically
Use of a and d.
Use of s and w.
Use of w only.
Use of a or d only.
Use of a and d but always hold w.
Face backwards, use of a and d but reversed.
Use of a and d, but usually at a 0.6 timescale.