Sorry to hear that but there is a start button, it says in the bottom left corner “Press anywhere to start” the controls are W,A,S, and D like any first person game. You don’t need to restart your computer to replay, you can just hit the windows button, and close it out if you want to reset it, I don’t know about Mac though. Could you please tell me what is bad about the game gameplay wise so I could fix it in the future .