Hello, currently the main menu options aren't active because we are still working on them. As for the save points, there are different ingame checkpoints that automatically save your progress. So after dying somewhere in the game you will start from the latest checkpoint you reached. Are you testing in VR or 3rd preson?
Yes, there is no way to load them because we still haven't implemented loading save files. Sorry to say that but once you quit the game and start a new game, you will start from the beginning. It is a demo after all and we will be working on implementing that. As for the sound issue, we're not sure what could be causing it. There are a few simple things you can try: make sure that once you start the Iragon application it is on focus by Windows. It might be showing on your desktop but still can be out of focus and if it is, the sound might not play fully or partially. Another thing you can try is check your headset sound input settings in the control panel to make sure that the sound is coming from there and not some other source like headphones and others. Let us know how that went.