When hitting the "How To Play" button on the "Game Over" UI, the "How To Play" UI is underneath the GameOver UI and is unable to be interacted with.
Either:
Make the "How To Play" button close the Game Over UI
Remove the "How To Play" button from the GameOver UI
When hitting the "How To Play" button on the "Game Over" UI, the "How To Play" UI is underneath the GameOver UI and is unable to be interacted with. Either: