As you've said on the game page it's a prototype and a lot of stuff still is not implemented or does not work. I'm not saying this is a bad thing, it's just a bit hard to test as you have no idea what to do or where to go (and what works). But, I talked with a few people and had a few encounters, there are no bugs as far as I could see, it's a very good prototype, I just wish more stuff was in the game so I could say more about it.
All I can say is, so far it's good (the mechanics seem to work fine), keep working as I'd love to play it again once more content is inside. :)