used for https://medium.com/@themukeshsolanki/classic-snake-game-with-jetpack-compose-2b78f4892ca

GameActivity.kt

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContent {
        SnakeTheme {
            Surface(
                modifier = Modifier.fillMaxSize(),
                color = MaterialTheme.colorScheme.background
            ) { SnakeGame() }
        }
    }
}
@Composable
override fun SnakeGame() {
  scope = rememberCoroutineScope()
  val state = gameEngine.state.collectAsState(initial = null)
  Column {
    state.value?.let { Board(it) }
    Controller {
        when (it) {
            SnakeDirection.Up -> gameEngine.move = Pair(0, -1)
            SnakeDirection.Left -> gameEngine.move = Pair(-1, 0)
            SnakeDirection.Right -> gameEngine.move = Pair(1, 0)
            SnakeDirection.Down -> gameEngine.move = Pair(0, 1)
        }
    }
  }
}