Help with audio issues? – Bob the Builder™: Build City Review

We purchased this app today, and after installing it on our iPad we realized there was no sound whatsoever. We were hooked by the app's promo video, which definitely has audio cues for children. Was the app supposed to be this way? Or are we experiencing an issue? If in fact you do not support audio yet, please let your subscribes know that up front.
Review by CaliMom789 on Bob the Builder™: Build City.