just to clarify, did you not like the sounds for the crates or were you not hearing them? Because there are actually sounds for the crates. I wanted them to seem sort of musical still, so maybe you just didn't pick them out? The sound for the shrink blocks is a modified symbol, the long blocks make a 'plink' noise, the bombs have a nice big boom, and the magnets have a low pulsating drone. -- maybe I need to pump up the volume for the 1.1 update ha ha.
actually you can hear most of them in the gameplay video you posted. maybe try headphones?