No sound – Ready Jet Go! Space Explorer Review

Checked App Support. Nothing has worked. App looks cool, but can't hear anything. 5-21-16 Still no sound! Argh! 6-8-16 No sound still. When the app starts I get a message that my speakers are muted when they are not! Dropping the rating to one star. 10-1-16 Still no sound. No app support at all!
Review by Barrynof on Ready Jet Go! Space Explorer.