It's not uncommon for Unity-based games to have no audio output on certain systems. If you have other Unity-based games and they also don't play any audio, try searching for general solutions to this problem: unity game no audio
If you're using Windows, please make sure your audio drivers are up to date and the system mixer is set correctly.
If you're running on an Asus motherboard/laptop and you have no audio, the problem may be related to Asus Sonic Studio III software.
Try uninstalling that software and running the game again.