MainActivity.kt

........

override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        viewModel = ViewModelProvider(this)[MainViewModel::class.java]

        tapMeButton = findViewById(R.id.tapMeButton)
        gameScoreTextView = findViewById(R.id.gameScoreTextView)
        timeLeftTextView = findViewById(R.id.timeLeftTextView)

        tapMeButton.setOnClickListener { view ->
            val bounceAnimation = AnimationUtils.loadAnimation(this, R.anim.bounce)
            view.startAnimation(bounceAnimation)
            if (!viewModel.isGameStarted){
                viewModel.startCountDownTimer()
            }else{
                viewModel.incrementScore()
            }
        }

        viewModel.timeLeft.observe(this, Observer { timeLeftOnTimer ->
            timeLeftTextView.text = getString(R.string.timeLeft, timeLeftOnTimer)
        })

        viewModel.liveScore.observe(this, Observer { score ->
            val blinkAnimation = AnimationUtils.loadAnimation(this, R.anim.blink)
            gameScoreTextView.startAnimation(blinkAnimation)
            gameScoreTextView.text = getString(R.string.yourScore, score)
        })

        lifecycleScope.launch{
            viewModel.channel.asFlow().collect {lastScore ->
                Toast.makeText(this@MainActivity, getString(R.string.gameOverMessage, lastScore), Toast.LENGTH_LONG).show()
            }
        }
    }
    ..............