You can change the animation type (or remove it) from Form Settings > Supercharge.
The following animations are currently available, with more on the way.
Free scroll
This one allows for free scrolling between the fields. The fields are automatically activated based on which field is visible on the screen at the time. That means, that clicking the Next button will continue the form from the current field and would not go back automatically to a field that was left empty before.
Scroll sideways
As the name suggests, this animation style moves from left to right. Free scrolling is not available with this type of animation. As only one field at a time can be visible.
Fade
This animation style fades the previous field to make the next field visible. Free scrolling is not available with this type of animation. As only one field at a time can be visible.
None
No animation is used. As soon as the next or previous button is pressed, the field instantly changes to the next activated field.