Thanks for kind words!!
We didn't put a save button in the demo yet. To be honest, we didn't expect people to play that much...
It's been asked a lot so I'll be activating the save system in our next milestone.
So sorry about that. This is not a bug we have encounter before. What platform are you playing on? Could you describe when it did happen in the game, the last time it happened? The more info I get, the faster I can fix the bug.
We haven't enabled the save system in the demo yet, but I can see how frustrating it can be in your case...
Again sorry about the bad experience, we are on the case!