Apologies for not explaining the controls! Tutorial bugged out and wasn't able to cover everything in the help menu. You move pieces using mouse controls - click to select your piece and then click one of the icons to do whatever action is associated with it. I've not heard of any of any troubles in which the controls entirely do not work, so I'm left to assume it was a miscommunication on our part as developers. Thank you for giving the game a go anyways!