Nice concept, good use of the theme.
I didn't get the poem at first, and it's only at level 5 or 6 that I understood I was loosing parts every X seconds. Also, it's not mentionned anywhere that you can restart the game by pressing R. However we hear several clock ticking then.
I didn't like the sound design, the cascade sound and death sound are way too loud, and the lone clock ticking gives off gloomy vibes.
Played to the end, it was nicely not too short not too long.