Which version did you download?
I've tried all of them, 32-bit and 64-bit. Running Windows 10 and I use unreal all the time. I tried running it as an administrator and that didn't make a difference either. I'm guessing the moment the game starts the foot starts to talk? and then the timer appears when he's finished? It's just silence for me. I saw about your game jam game on killscreen and wanted to give it a go :)
That's strange... I know this is a silly question, but is the game possibly muted in Windows? If not that (and this probably isn't it either if you can play other Unreal engine games with sound), are your audio drivers up to date?
Unfortunately I don't think there's a whole lot I can do on the development end, because this is the first time I've worked with Unreal so I'm not exactly sure where to start looking, but I'll see if I can figure out a solution just in case other people are having the same issue.