Course: Building a Block Based Game

@uniwang - a couple of possible solutions come to mind:

  1. If you have a game controller plugged in, unplug it and try again.

  2. Make sure the SetPreviewBlock function in the BP_BlockPlayer is removing the collision for the PreviewBlock:

Let me know if that helps.

One other possibility is the mouse is moving the crosshair and the character is turning accordingly.