Wow that was weird.
I wonder if the game is about collecting crabs or getting to listen the music without interruptions. In the end I found myself not caring at all for crabs and mashing space bar to enjoy the music.
I didn't understood what the space bar did exactly and I'm still not sure if the red crabs are the reasons why I died.
The only thing pertinent thing that I have in mind is that the sfx is much louder than the music, to a point where it gets in the way of rewarding the player that manages to fall indefinitely.
I strangely enjoyed the experience :O