There is no indication of viewpoint (mouse) movement, but the viewpoint as shown in the video is important. When moving to the right (pressing the D key), the viewpoint also points to the right.

※The following is the original Japanese text. 視点（マウス）移動の表示はないですが、動画のような視点移動は大事です。 右への移動（Dキーを押した）時に、視点も右を向いています。