There should have been background music and keyboard sounds? It may have gotten messed up, I'll have to see later.
Viewing post in Too Big To Fail jam comments
It seems most of the sound is just broken when exported, how strange, the actual gameplay video has the audio (recorded on the non-exported version in the engine) if you were wondering how it was meant to sound, but how strange a problem, I'll have to take more care of the audio properly functioning next time.
On review of the problem, it seems I was loading the background music and the button-click sound incorrectly, leaving only the cash earn sound functioning properly, whoops.