player-movement.ts

 const movement = Object.entries(gameState.controls.movement).reduce(
    (acc, [key, value]) => ({
      ...acc,
      [key]: KeyboardController({
        key: value,
        action: (dt) => move(dt, key as Model.Player.Direction),
      }),
    }),
    // In my opinion, there is unsafe 'as'
    {} as Model.Player.Movement
  );

  // [methods]

  function move(dt, direction: Model.Player.Direction) {
    // The 3rd, minimum readability
    sprite[EAxis[direction]] += dt * state.speed * EPlayerDirections[direction];

    // The 2nd, less readability, but it is shorter

    if (direction === "left" || direction === "right") {
      sprite.x += dt * state.speed * EPlayerDirections[direction];
    } else if (direction === "up" || direction === "down") {
      sprite.y += dt * state.speed * EPlayerDirections[direction];
    }

    // The 1st, too long

    switch (direction) {
      case "left":
        sprite.x += dt * state.speed * -1;
        break;
      case "right":
        sprite.x += dt * state.speed * 1;
        break;
      case "up":
        sprite.y += dt * state.speed * -1;
        break;
      case "down":
        sprite.y += dt * state.speed * 1;
        break;
      default:
        break;
    }
  }