Hi, and thank you for playing all the way to 1-5! Good catch on the boss – the snapping was not intended. That boss (the Colossus) is gone as of today: in 0.9.1 the end boss of every world is Bravor, the face with the hands that chases you, and you don't beat him, you escape him before the countdown runs out. If you give 1-5 another try, I would love to know whether he moves smoothly for you.