■ you, predicted   □ you, server-acked (wireframe)   ■ other players, interpolated (each has a color of their own)   ■ obstacle (translucent: overhead)  ·  WASD / arrows move, Space jumps (tap again in the air to double-jump), Shift sprints (yellow bar), hold Ctrl or C to crouch (half height, no sprint), Enter chats (Esc cancels), / types a command (/help lists them), Esc opens the menu; right-drag turns the camera (W walks where it looks), wheel zooms; B switches build / race  ·  Gun Mode (menu or /gun): click to aim, the mouse turns the camera, left button fires, sprint + Space dash-rolls, green bar is health (100 HP, 10 per hit; at 0 you are downed for 5 s)