No sound on this app – I Hear Ewe Review

I can’t get the sound to work on this app. To the person who thinks a ton of reviewers can’t use their iPads...yes we know how to use our iPads. It isn’t muted and the sound is all the way up and every other app is making sounds except this one. I don’t see any options anywhere to fix this problem. I deleted and redownloaded and still have the same issue.
Review by volumeem on I Hear Ewe.