Solid game, I love the reverse snake concept. The fact that you have actual volume sliders is also a huge plus for me. Nothing I can really complain about except for the fact that the game isn't endless, but then that'd be going against the limitation.
I personally think the 60 second timer isn't incorporated enough because the game would still be functional and even better if the timer got removed. I don't really know how else one would implement the timer other than the way you did.
Overall I really enjoyed the game!